Electrical Shore Ties CSTO - 2025 DRAFT.pdf

Mission Support Business Model

Configuration

Standard

Technical Order

Electrical Shore Ties (Rev B)

SILC-CSTO-36-11 21 27 11-04

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Commander U.S. Coast Guard Shore Infrastructure Logistics Center

300 East Main Street, Suite 800 Norfolk, VA 23510-9104 Staff Symbol: (C) Phone: (757) 628-4277 Fax: (757) 628-4322 John.D.Berry@uscg.mil

11000

DD MMM YYYY

Subj: ELECTRICAL SHORE TIES (REV B)

Ref: (a) Civil Engineering Manual, COMDTINST M11000.11 (series)

(b) Shore Infrastructure – Mission Support Business Model Requirements Directive

Technical Order, SILC-RDTO-36-11 29 11 00-01 (latest)

1. PURPOSE. This Configuration Standard Technical Order (CSTO) establishes standards for Electrical Shore Tie systems for Coast Guard shore facility applications.

2. ACTION. Resource managers overseeing the delivery of shore infrastructure products and services shall ensure compliance with the provisions of this technical order in accordance with references (a) and (b).

3. AUTHORIZATION. This technical order has been authorized by the Shore Infrastructure

Logistics Center (SILC) Commander.

4. DIRECTIVES / TECHNICAL ORDERS AFFECTED. This technical order supersedes

SILC-CSTO-36-11 21 27 11-04 Rev A.

This revised technical order implements the following changes:

• Recommended practices are now required.

• Majority of Appendix B is the body of the technical order.

• Appendix C has been updated.

5. ENVIRONMENTAL ASPECT AND IMPACT CONSIDERATIONS.

a. The development of this technical order and the guidance contained within it have been thoroughly reviewed by the originating office in conjunction with SILC Environmental Management Division (EMD). This guidance is categorically excluded under current Department of Homeland Security (DHS) categorical exclusion L5 from further environmental analysis in accordance with the U.S. Coast Guard Environmental Planning Policy, COMDTINST 5090.1 (series).

b. This guidance will not result in any substantial change to existing environmental conditions or violations of any applicable Federal, state, local laws relating to the protection of the environment. All future specific actions resulting from the general guidance in this technical order must be individually evaluated for compliance with the National Environmental Policy Act (NEPA) and other applicable environmental mandates, consistent with Coast Guard Environmental Planning Policy.

6. DISTRIBUTION. SILC Configuration Manager posts an electronic version of this technical order in Coast Guard Technical Information Management System (CG-TIMS) mailto:John.D.Berry@uscg.mil

Subj: ELECTRICAL SHORE TIES (REV B) 11000 and adds the document in the Approved Technical Order Library on SILC's Configuration

Management Page on the CG Portal. No paper distribution will be made of this document.

7. SCOPE. The standards described in this technical order shall be implemented in accordance with the following constraints.

a. TECHNICAL AUTHORITY. The technical authority for this technical order is the

SILC Commander. Additional roles and responsibilities associated with executing this configuration standard are identified in Section 1.3 of this technical order.

b. ASSETS / EQUIPMENT. This technical order applies to waterfront electrical shore ties, which are components of electrical distribution systems (CATCODE 812-32).

8. TOOLS AND EQUIPMENT. No tools required.

9. TRAINING. Implementation of this technical order does not require training beyond standard Coast Guard requirements for personnel.

10. DEVELOPMENT TEAM. The following authorities and subject matter experts were significantly involved in producing this technical order.

ORIGINAL DOCUMENT (2011) DEVELOPMENT TEAM

Name Position Organization

Al Boudreau Subject Matter Expert BASE KODIAK

John Mathews Subject Matter Expert FDCC

Carl Lundquist Subject Matter Expert SFLC

Wade Williams Subject Matter Expert SFLC

David Robinson Subject Matter Expert CEU Miami

Eric Tipping Subject Matter Expert FDCC

2023 REVISION A DEVELOPMENT TEAM

Name Position Organization

Al Boudreau Subject Matter Expert BASE KODIAK-FE

CDR Eric Para Product Line Manager SILC-PL-MSPL

CDR Maile Tesler Deputy Product Line Manager SILC-PL-MSPL

LCDR Liam McCue Product Line Branch Chief SILC-PL-MSPL

Tim Shea Asset Line Manager SILC-PL-MSPL

LT Matt Fann Subject Matter Expert CEU PROVIDENCE

Scott Arsenault Subject Matter Expert CEU PROVIDENCE

Subj: ELECTRICAL SHORE TIES (REV B) 11000

Dolores Pyne Mercier Subject Matter Expert SFLC-ESD-NAME-ESS

Shawn Orlena Subject Matter Expert SFLC-ESD-NAME-ESS

2024 REVISION B DEVELOPMENT TEAM

CDR George Hall Product Line Manager SILC-PL-MSPL

CDR Keely Higbie Deputy Product Line Manager SILC-PL-MSPL

LCDR Sarah Hansen Product Line Branch Chief SILC-PL-MSPL

LT Sara Murallo Product Line Branch Chief SILC-PL-MSPL

Tim Shea Asset Line Manager SILC-PL-MSPL

Al Boudreau Subject Matter Expert BASE KODIAK-FE

LT Matt Fann Subject Matter Expert CEU PROVIDENCE

Dolores Pyne Mercier Subject Matter Expert SFLC-ESD-NAME-ESS

11. FORMS / REPORTS. None

12. REQUEST FOR CHANGES. Submit recommendations for technical order improvements, waivers, or corrections in accordance with the Engineering Change Proposal (ECP) Process Guide Technical Order (PGTO).

JOHN D. BERRY, P.E.

Captain, U.S. Coast Guard Commander, Shore Infrastructure Logistics Center

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Electrical Shore Ties Rev B i

TABLE OF CONTENTS

1 Overview

1.1 Configuration Standard Summary

1.2 Applicability

1.3 Roles and Responsibilities

2 Technical Requirements

2.1 Organization

2.2 Scope

2.2.1 Who Performs

2.2.2 Applicability

2.2.3 When to Perform

2.2.4 To Whom (Customers)

2.2.5 Suppliers

2.3 Process Links

2.4 General Design Requirements

2.4.1 General Requirements

2.4.2 Receptacles and Safety Interlocks

2.4.3 Safety Interlocks for Parallel Feeders

2.4.4 Equipment Location

2.4.5 Raceways and Conductors

2.4.6 Installation and Acceptance Testing

2.5 Shore Tie Standards – Small Boats

2.5.1 Table A-1Main Disconnect Requirements

2.5.2 Feeder Requirements

2.5.3 Electrical Receptacle and Plug Requirements

2.6 Shore Tie Standards – Cutters

2.6.1 Main Disconnect Requirements

2.6.2 Feeder Requirements

2.6.3 Isolation Transformer Requirements

2.6.4 Power Mound Requirements

2.6.5 Electrical Receptacle and Plug Requirements

3 References

4 Definitions

Appendix A – Shore Tie Receptacle and Connector ............................................................................ A-1

Appendix B – Recommended Maintenance .......................................................................................... B-1

Appendix C – One-Line Diagrams .......................................................................................................... C-1

Appendix D - Shore Tie Grounding Diagrams ...................................................................................... D-1

Appendix E – Shore Power Standard Operating Instructions ............................................................ E-1

Appendix F – Photos ............................................................................................................................... F-1

1 OVERVIEW

1.1 Configuration Standard Summary

This Configuration Standards Technical Order (CSTO) establishes standards for electrical shore tie systems supporting United States Coast Guard (USCG) small boats and cutters. The Shore

Infrastructure Logistics Center (SILC) is responsible for the shore tie systems from the shoreside main circuit breaker to the shore tie receptacle and is also responsible for identifying the receptacle’s mating shore tie cable plug. The Surface Forces Logistics Center (SFLC) is responsible for the shore tie systems from the plug on the shoreside end of the shore tie cable to the electrical system on the cutter or boat. This CSTO is based on the use of Russellstoll® shore tie receptacles and shore tie plugs for small boats and low-power cutters and Military

Specifications (MIL-SPEC)/NATO plugs and receptacles for high-power cutters.

Standardization of electrical shore ties for cutters has significantly improved interoperability of surface forces. A standard nationwide shore power receptacle/plug configuration for cutters is desirable to support homeport changes, new cutter construction, and extended out-of-area deployments. The standard receptacle/plug configuration for each cutter provides for shore power connectivity even at deployable and re-deployable locations.

1.2 Applicability

This technical order applies to all new or replacement electrical shore tie systems installed to support USCG vessels. Specifically, this guidance applies to shore ties supporting small boats, high-power cutters, and low-power cutters at Coast Guard shore facilities. All other shore ties provided to support other boats shall comply with National Electrical Code (NEC) Article 555, Marinas, Boatyards, and Commercial and Noncommercial Docking Facilities.

This CSTO does not identify the cables connecting the vessel to the shore tie.

Figure 1-1 is intended to aid in identifying the correct section and diagram for each vessel type.

Figure 1--1: Shore Tie Selection

Go to section 2.5 Shore Tie Standards – Small Boats

See table A.1 Small Boats

Start

High Power Cutter (Length >= 175' Shore power >=

300A)

Low Power Cutter (65'<= Length <175'

Shore power < 300A)

Small Boat (Length < 65')

Shore Tie Selection

Go to section 2.6 Shore Tie Standards – Cutters

See table A.2 Low Power Cutters

Go to section 2.6 Shore Tie Standards – Cutters

See table A.3 High Power Cutters

End

1.3 Roles and Responsibilities

The technical authority for this configuration standard is the SILC Commander. Mission Support

Product Line (MSPL) Manager review is required for all new electrical shore tie designs. Table

1-1 enumerates the roles and responsibilities for executing the standards defined in this technical order. The following “RASCI” codes are used:

R = Responsible: Those who do the work (typically only one Responsible per task).

A = Approver: The one ultimately accountable for the deliverable or task (must have only one Approver per task).

S = Supports: Those who provide resources, information, expertise, or other assistance in completing of the task. A Supports role indicates more intensive and consistent involvement than just being identified in a Consulted role.

C = Consulted: Those whose opinions are sought (two-way communications).

I = Informed: Those who are kept up to date on progress (one-way communication).

Table 1-1: Roles and Responsibilities RASCI Matrix

Task, Deliverable, or Responsibility SF

LC

- S

DT

CG

-4

CG

-4

Pl an ni ng

SI

LC

CE

U

M

AS

I M

SP

L

El ec tri ca l S ho re Ti e W

G

Fa cil ity E ng in ee r

FD

CC

CG

-9

A cq ui sit io n

Te ch ni ca l W ar ra nt

H ol de r

Identi fy and priori tize new shore tie requirements C A R S C I I C

Develop new shore tie project C C C R

Construction management and

Commiss ioning of shore ties I C I S R

Develop Specs for Approved

AFC43 Project R C C

Construction Management and

Commiss ioning of AFC43 shore ties

R C I S

Waiver request process I C R S S

Update CSTO C S R S C C

Manage Russel lStol l receptacle s tock C R

2 TECHNICAL REQUIREMENTS

This CSTO establishes standards for the electrical infrastructure of the shore ties based upon

SFLC facility requirements for each vessel. In conformance with logistics practices and to enhance homeporting interoperability, shore ties shall be standard for each cutter class and for each class of small boats. Standardization of shore ties will normally occur during the acquisition phase, with funding provided from the appropriation used to procure the new cutters/small boats. This CSTO applies to new installations and/or modernization and recapitalization of existing shore ties.

This CSTO addresses only the shoreside facilities and equipment to provide electrical service to cutters and small boats.

2.1 Organization

This CSTO covers the SILC’s responsibility for configuring and installing electrical shore ties, and each surface asset section of this CSTO (Section 2.5 and 2.6) is organized into the following subsections from upstream to downstream of the electrical circuit when applicable:

• Main Disconnect Requirements

• Feeder Requirements

• Isolation Transformer Requirements

• Power Mound Requirements

• Enclosure, Electrical Receptacle and Plug Requirements

• Installation and Acceptance Testing

This technical order defines the requirements for providing acceptable facility/vessel (cutters and small boats) electrical shore ties throughout the Coast Guard for both new and existing assets as identified in Appendix A, Table A-1, Table A-2, and Table A-3.

2.2 Scope

The boundaries of engineering responsibility between this SILC CSTO; the Naval Engineering

Manual, COMDTINST M9000.6 (series); and the Command, Control, Communication, Computer, Cyber and Intelligence Service Center (C5ISC) are the receptacle in the shore tie enclosure and plug on the shoreside end of the shore tie cable. This standard is based on

Russellstoll® receptacles for small boats and low-power cutters as well as MIL-SPEC receptacles for high-power cutters. For clarification purposes, the responsibilities for the SILC, SFLC, and C5ISC are divided as follows:

SILC: This CSTO covers the electrical distribution system and all associated equipment from the shoreside main circuit breaker to the shore tie receptacle on the pier. It also identifies the connector based upon SFLC-defined requirements.

SFLC: The SFLC is responsible for defining the electrical system and all associated equipment from the plug on the shoreside end of the shore tie cable to the electrical system on the cutter/boat. Shore tie cables are under the purview of the SFLC and thus outside the scope of this CSTO. The SFLC is responsible for providing shore tie cables with the proper plug to connect to the shore tie. Therefore, best practices for the proper care, storage, and maintenance of shore tie cables are not addressed in this SILC CSTO.

C5ISC: Command, Control, Communications, Computers, Cyber and Intelligence Service

Center (C5I) shore tie cables provide shipboard connectivity to the provided voice circuits and data circuits from the servicing shore facility, as identified in U.S. Coast Guard C5I Shore Tie

Cable Standards. No other services (i.e., CCTV, CATV, etc.) are considered part of the standard C5I shore tie. Shore tie receptacles for cutter C5I communications are only covered by this CSTO when they are included in a power mound configuration. Standalone communication shore-ties are not included in this technical order.

2.2.1 Who Performs

The SILC is responsible for executing this technical order for the shoreside electrical system installation, based upon the pier-side power system requirements provided by the SFLC. The

Facilities Design and Construction Center (FDCC), Civil Engineering Units (CEUs), and Facility

Engineers (FEs) for HQ units of the SILC are responsible for executing the requirements of this technical order. The FDCC and the CEU organizations will execute this technical order through their contracting officers with appropriate Procurement, Construction, and Improvements (PC&I) or Coastal and Shore Operations-Depot Level Maintenance (CSO-DLM) funding.

Any request for deviation from the guidance provided within this CSTO requires an approved waiver in accordance with the Engineering Change Proposal PGTO (SILC-PGTO-36-11 21 24

31-14).

2.2.2 Applicability

All surface forces (cutters and boats) and their homeport and logistics facilities are covered under this technical order.

2.2.3 When to Perform

All new construction, recapitalization, and shore tie upgrades at piers and wharfs shall comply with this technical order.

2.2.4 To Whom (Customers)

The technical order shall be used by all facility managers (CEU, Base FE, Engineering Officers

(EO), sector logistics officers, or FDCC for new facilities) to plan, design, repair, and construct shore ties for all cutters and small boats.

2.2.5 Suppliers

CEUs, FEs, EOs, shall contact MSPL to procure replacement enclosures and receptacles when required. Cutter crews and small boat station personnel shall not construct or procure their own replacement enclosures and receptacles.

2.3 Process Links

To ensure compliance with the principles of configuration management, electrical shore ties are established as a Configuration Item (CI). The as-built drawings for the shore ties will document the physical baseline of the CI. Changes to this Configuration Standard for electrical shore ties https://uscg.sharepoint-mil.us/:b:/s/silc_spo/ESD/configurationManagement/EXQ2ydRsBQJEqGVqjX2N_tIBghXTiUepoYxrqqUQPwcE3w?e=1y6eyo https://uscg.sharepoint-mil.us/:b:/s/silc_spo/ESD/configurationManagement/EXQ2ydRsBQJEqGVqjX2N_tIBghXTiUepoYxrqqUQPwcE3w?e=1y6eyo must be submitted for approval first through the SILC Engineering Change Proposal (ECP) process and then through the SFLC Engineering Board. Guidance for the SILC ECP process can be found in the Engineering Change Proposal PGTO (SILC-PGTO-36-11 21 24 31-14) and.

Inspections will be conducted and documented through Functional Configuration Audits (FCAs) and Physical Configuration Audits (PCAs) to validate configuration compliance.

2.4 General Design Requirements

2.4.1 General Requirements

Shore power infrastructure (up to the dockside receptacles) shall be designed and installed in accordance with the latest edition of the NEC; circuits intended to supply ungrounded power to vessels shall fully comply with the minimum requirements of NEC Article 250.21(A) and (B).

Grounded installations shall comply with latest article of NEC Article 555, Marinas, Boatyards, and Commercial and Noncommercial Docking Facilities. Ungrounded power must have proper ground monitoring.

Utilities provide grounded power for customer use with ±5% voltage variations. Shore power voltage variations during operation of up to ±5% of 450V nominal, typical of most utilities, are permissible. To meet the 450V ungrounded delta power requirements for Coast Guard cutters, this service will require transformation to ungrounded power.

2.4.1.1 Arc Flash

An arc flash study, including arc flash labeling of the electrical system, shall be provided in accordance with safety guidelines per latest edition of National Fire Protection Association

(NFPA) 70E, NEC 110.16 and Occupational Safety and Health Administration (OSHA) 29. Arc flash labels shall be posted in a conspicuous location on the exterior of its enclosure. Any personnel working within the flash protection boundary shall wear Personal Protective

Equipment (PPE) that meets the flash hazard risk category in accordance with NFPA 70E requirements.

2.4.1.2 Enclosures

Equipment enclosures shall be designed and fabricated such that the internal components will perform their intended function satisfactorily in the environment to which the enclosure is exposed. Enclosures for electrical equipment shall be in accordance with National Electrical

Manufacturers Association (NEMA) or International Electrotechnical Commission (IEC) standards. Paint coating systems must meet the minimum requirements of Institute of Electrical and Electronic Engineers (IEEE) C57.12.29 unless noted otherwise herein. Outdoor enclosures shall be designed to accommodate the heaviest rain, ultraviolet/solar heating, freezing, and wind-blown spray expected at the site. Enclosures located at or near the waterfront piers shall be of NEMA 4X construction with type 316 stainless steel exterior hardware. Enclosures that require ventilation are required to be NEMA 3RX rated and constructed of type 316 stainless steel when located at or near the waterfront. Where practicable, elevate enclosures of switching gear and transformers in accordance with the flooding considerations outlined in section 2.3 of the New Building Design & Construction CSTO (SILC-CSTO-36-71 91 11 13-10). All other enclosures shall be located at a minimum of two feet above the highest tide level for the area under normal circumstances as required by the latest edition of NEC 555.

https://uscg.sharepoint-mil.us/:b:/s/silc_spo/ESD/configurationManagement/EXQ2ydRsBQJEqGVqjX2N_tIBghXTiUepoYxrqqUQPwcE3w?e=1y6eyo https://uscg.sharepoint-mil.us/sites/silc_spo/ESD/configurationManagement/Approved%20TOs/Forms/Documents%20by%20Owner%202.aspx?id=%2Fsites%2Fsilc%5Fspo%2FESD%2FconfigurationManagement%2FApproved%20TOs%2FNew%20Building%20Design%20and%20Construction%20CSTO%2Epdf&parent=%2Fsites%2Fsilc%5Fspo%2FESD%2FconfigurationManagement%2FApproved%20TOs

2.4.1.3 Transformers

Current transformer shall be equipped with Metal Oxide Varistors (MOVs) or other protective device to limit secondary winding open circuit voltage if a current loop connection is broken, shall be permanently attached to a non-current-carrying structure, and shall not be tied off to bus bars or other conductors.

Potential transformer shall have one secondary winding lead of each potential transformer grounded to earth. Minimize the length of unprotected transformer lead wiring. Each ungrounded primary and secondary transformer winding lead shall be fused

2.4.1.4 Shore Tie Plugs

The plugs and receptacles utilized for shore ties supporting standard small boats and low-power cutters are standardized on Russellstoll®. The plugs and receptacles utilized for shore ties supporting high-power cutters are standardized on MIL-C-24368/2, also referred to as NATO, Joy, or Viking receptacles. For receptacle and plug requirements, see Table A-1 for Small

Boats, Table A-2 for Low-Power Cutters, and Table A-3 for High-Power Cutters.

Splicing cables is prohibited.

2.4.1.5 Equipment Standards

All electrical cables, conduits, and components shall be constructed in accordance with nationally recognized industrial electrical equipment manufacturing standards. Such standards are issued by Underwriters Laboratories (UL), the NFPA, the NEMA, the American National

Standards Institute (ANSI), the IEEE, and the IEC.

2.4.1.6 Utility Service

Verify that the source transformer has achieved the required grounding impedance by testing with a fall-of-potential meter. UFC 4-150-02 Dockside Utilities for Ship Service requires a ground system at piers, wharves, and other waterfront structures that measure no more than 5 ohms. If the ground impedance is not within these parameters, then additional ground electrodes will need to be added. Ground systems shall be installed in accordance with the latest of NEC article 250.50.

2.4.1.7 Accessibility

Clearances shall be provided in the immediate vicinity of electrical equipment (NEC Article 110) and machinery to permit complete accessibility for operation, maintenance, repairs, renewal of fuses, and testing.

Arrange dockside receptacles so that shore tie plugs can be connected and disconnected without a significant risk of falling overboard. Cables connected to such receptacles should not block access to dockside utility service pits or pass over steam piping. Provide adequate space for cable slack not subject to vehicular traffic.

2.4.1.8 Overcurrent Protection

Circuit breakers are the preferred Overcurrent Protective Device (OCPD). New fused power and lighting circuits may be installed only in existing fuse panels.

https://www.wbdg.org/dod/ufc/ufc-4-150-02

When the sum of 125% of the continuous load plus 100% of the non-continuous load of a new or modified circuit is expected to exceed the OCPD rating, the OCPD must be specially rated for long-term operation at 100% of its rating. Alternatively, the next larger fuse or circuit breaker trip rating, if permissible for the specific application, may be used, or the load may be split between two or more circuits.

Because of the low impedance of many delta-delta isolation transformers, magnetizing currents can exceed the trip setting of circuit breakers set at no more than 125% of rated load.

Consequently, overcurrent protection is generally required on both the primary and secondary windings, even when the conditions of NEC Article 450 for no secondary overcurrent protection can be satisfied.

2.4.1.9 Control Transformers

The control voltage for new equipment shall be at a potential of either 24 or 120 VAC.

Minimize the length of unprotected transformer lead wiring. Each ungrounded primary and secondary transformer winding lead shall be fused.

The control power transformer power rating shall be sufficient to operate all components that may be simultaneously energized.

2.4.1.10 Switches

Switches in high-traffic areas that could be inadvertently operated by contact with passing personnel shall be equipped with guards or other protection. Such protection shall not obscure the visibility of the switch position.

Switches and indicators that will be continuously exposed to weather shall be of the NEMA 4X or 6 type, both of which are operable with a single gloved hand. When such a switch must be operable under freezing conditions, the switch enclosure shall be equipped with an anti-icing heater and thermostat.

Experience has shown that unprotected NEMA 4X pushbutton switches often leak when continuously exposed to heavy weather. Such switches shall normally be protected with a cover plate or outer housing to deflect rain and spray when not in use. When such protection is not feasible or would impede access to the controls, each pushbutton switch shall be equipped with a supplemental rubber boot.

Indicators may be of the single or double incandescent bulb type, although low-maintenance, high-brightness light-emitting diode (LED) type is preferred. Control wiring for LED circuits shall have individually shielded conductors. Indicator bulb voltage shall be no greater than 120 volts.

A step-down transformer (AC) or resistors (DC) may be used to reduce input voltage.

2.4.2 Receptacles and Safety Interlocks

A limited supply of new Russellstoll® receptacles is maintained at the SFLC warehouse and is only available through direct coordination with the MSPL. The primary purpose for this inventory is to support Casualty Reporting (CASREP) response and hurricane recovery. Receptacles may also be provided as government-furnished equipment for construction contracts impacted by long delivery times or other contractual issues. For configurations requiring Russellstoll® shore tie receptacles, MSPL has created an inventory program to assist with long lead time and Buy

American Act complications that may exist. Subject to inventory levels, MSPL can provide government-furnished receptacle equipment to assist with new construction, depot level maintenance, and casualty repairs to CEUs or shore facilities upon request. To get more details on the program visit MSPL’s shore tie program SharePoint page located here. MIL-SPEC receptacles are not inventoried at this time.

All shore power receptacles shall be equipped with a safety interlock, like the Russellstoll®

MaxGard, ESL Power Systems Interlock, or electrical microswitch configured for NATO receptacles, that blocks insertion and removal of the plug when the receptacle is energized. A safety interlock on the receptacle prevents installation or removal of a plug while the integral disconnect switch or circuit breaker is closed, protecting personnel from a possible arc that could damage the plug or cause burns. The components are designed for heavy duty marine use and exposure to salt-laden moisture.

Camlocks, pigtails, adapter cables, pass-through boxes, and/or any other device or configuration that bypasses the safety interlock shall not be authorized or installed. Failure to comply could lead to electrocution.

2.4.3 Safety Interlocks for Parallel Feeders

Cutters requiring multiple receptacles shall have safety interlocks that prevent fault current back-feed through parallel feeder circuit breakers during a fault on any of the parallel feeders per latest edition of NEC 240.8.

See additional information from IEEE, IEC, and ISO Joint Work Group 28.

D. Paul, V. Haddadian, B. Chavdarian and K. Peterson, "Low-voltage shore connection power systems," 2017 IEEE/IAS 53rd Industrial and Commercial Power Systems Technical

Conference (I&CPS), Niagara Falls, ON, Canada, 2017, pp. 1-6, doi:

10.1109/ICPS.2017.7945128.

2.4.4 Equipment Location

Electrical equipment shall be constructed with a coating system and located to maximize protection from vehicle impacts, storm surges, flooding, and windblown or floating debris.

Electrical equipment susceptible to vehicle impacts shall be protected by appropriately sized, placed, and anchored bollards. Bollards shall be painted bright yellow with optional black striping or provided with a commercially manufactured identification cover assembly.

2.4.5 Raceways and Conductors

2.4.5.1 Conduit and Cable Trays

Any conduit run underneath piers and wharves shall be adequately supported and braced to prevent rupture due to seismic motion, impacts from floating debris, storm surges, or flooding.

Conduit support structures shall be capable of resisting gravity loads as well as buoyant forces.

Conduit and trays shall be supported with stainless steel hardware.

https://uscg.sharepoint-mil.us/sites/silc_spo/CE%20Product%20Lines/MS/SitePages/Russellstoll-Receptacles.aspx?source=https%3a//uscg.sharepoint-mil.us/sites/silc_spo/CE%20Product%20Lines/MS

2.4.5.2 Non-Metallic Raceway

Epoxy fiberglass conduit or Reinforced Thermosetting Resin Conduit (RTRC) (minimum ¼ inch wall thickness) or epoxy fiberglass cable trays shall be used underneath piers and wharves.

Cable trays may be used where protection or elevation avoids impact from debris.

Above pier shall be either RTRC or PVC schedule 80.

PVC schedule 40 shall not be used.

For installations with large numbers of heavy cables, non-metallic epoxy fiberglass cable trays are recommended under piers when protected from floating debris.

2.4.5.3 Metallic Raceway (Optional)

PVC-coated Rigid Galvanized Steel (RGS) (urethane interior coating) conduit, marine-grade aluminum, or Type 316 stainless steel cable trays shall be used underneath piers or wharves.

Certain design considerations should be considered before using either system, as follows:

• PVC-coated RGS conduit shall be properly tied into the earth electrode ground system for the pier. RGS conduit will corrode in marine environments, can experience significant induced current as a result, and shall thus be carefully considered. Consider oversizing conduit to accommodate conductor bundling and thus minimize induction per NEC.

• Marine-grade aluminum or Type 316 stainless steel cable trays may be used, but all shore tie feeder conductors shall be bundled per NEC to reduce induction.

• PVC-coated RGS shall be installed by contractors with a minimum of 5 years of experience. Continued maintenance and inspection of system is necessary to ensure couplings and connections retain integrity and avoid corrosion.

• RGS, Rigid Metal Conduit (RMC), and Electric Metallic Tube (EMT) shall not be used on waterfront areas.

• Type 316 stainless steel may be used and shall be supported with stainless steel hardware.

2.4.5.4 Conductors

Multiple conductor control cables to power mounds from switchgear shall be shielded. Cables that run through vaults or under piers or wharves shall be designed for submergence. Shore power cable ampacity shall normally be calculated at 40°C (104°F) ambient air temperature. A

50°C (122°F) ambient air temperature should be substituted in exceptionally hot climates.

For services exceeding 400 amperes, 535 MCM single conductor diesel locomotive (DLO/UL44

RHH-RHW-2) cable is the required minimum American Wire Gauge (AWG) wire size because of its flexibility and resistance to moisture. Actual wire size shall be increased as required to not exceed the specified maximum permitted cable voltage % (cable distance from dedicated voltage isolation transformer to power mound receptacle). Each conduit should contain exactly one conductor of each phase. For cable trays, single conductor cables should be tightly banded into triplexed phase bundles. To prevent inductive heating, unbundled single conductor cables shall not encircle ferromagnetic material. Larger sizes of DLO cable may be required for long runs based on an allowable voltage drop at full rated load.

Double banking or parallel stacking of power cables is not allowed.

2.4.5.5 Voltage Drop

The feeder conductor distance from the disconnect switch ashore to the shore tie connection onboard the cutter to include shore tie cables should be minimized to prevent excessive voltage drop. Per latest edition NEC 210.19 and 215.2(A)(2) Informational Notes, conductors for feeders shall be sized to prevent a voltage drop exceeding 3%, conductors for branch circuits shall be sized to prevent a voltage drop exceeding 3%, and the combination of feeders and branch circuits shall not exceed 5%.

Excessive voltage drop in supply conductors can cause inefficient operation or malfunction of electrical equipment. Under-voltage conditions reduce the capability and reliability of motors, lighting sources, heaters, and solid-state equipment. It may be necessary to compensate for this with an installation beyond the minimum requirements.

Longer shore tie cables may increase voltage drop. Providing additional shore tie cables in parallel may decrease voltage drop. If longer shore tie cables are required, FEs and EO shall coordinate with Surface Acquisitions Logistics Center (SALC) and SFLC engineers to determine cable sizes/design to ensure voltage drop is not an issue.

2.4.5.6 Terminations

Cables shall terminate on bus bars and circuit breakers with silver-plated compression type ring terminals, which are to be applied using the manufacturer-recommended crimper and die. Anti-rotation clips shall be used with single hole type lugs to prevent possible short circuiting with nearby conductors. Provide stud adapters on circuit breakers for landing lugs.

Compression lugs for DLO cable (and other finely stranded cable) shall be specifically designed for such conductors. Utilize oxide inhibiter on cable prior to compression of lug and sleeve heat shrink over barrel of lug and at least 3 inches over conductor jacket.

Terminations utilizing Allen screws or mechanical clamps shall not be used.

2.4.6 Installation and Acceptance Testing

All acceptance tests shall be performed in the presence of a Coast Guard inspector or

Contracting Officers Representative (COR). Contractor shall provide a written report to the

Coast Guard inspector of all test results within one week of test completion. Prior to installation a Coast Guard inspector or COR shall carefully examine all new electrical equipment. The inspection shall determine whether the equipment or its insulation has been cut, bruised, or otherwise damaged; whether any small parts have been bent, broken, or lost; or whether the equipment has been damaged. All damaged items will be repaired, where possible. If repair is not possible, then the item shall be replaced.

Care should be exercised to ensure that the types and temperature ratings of conductors being installed in the unit are suitable for use with the terminals provided.

Use care in stripping insulation from conductors so as not to nick any of the conductors.

Check and tighten all accessible electrical connections to the manufacturer’s torque specifications.

Manually exercise all switches, circuit breakers, and other operating mechanisms to make certain they operate freely.

Check to determine that all grounding connections are properly made.

To make sure that the system is free from short circuits and ground faults, conduct an insulation test both phase to ground and phase to phase with the switches or circuit breakers in both the open and closed positions. If the resistance reads less than 1000 kilohm while testing with the branch circuit devices in the open position, the system may be unsafe and should be investigated and corrected. Some electronic equipment (metering, TVSS, etc.) may be damaged by this testing. Refer to the manufacturer’s equipment markings for guidelines. Refer to additional insulation testing information below.

Clean the enclosure of all foreign materials. If parts at connection points are spattered with cement, plaster, paint, or other foreign material, remove the foreign materials with great care to avoid damage to the connections.

Set any adjustable time current trip device settings to the proper values.

Install covers and closed doors, ensuring no conductors are pinched and that all enclosure parts are properly aligned and tightened.

Install new stainless-steel banding and rubber channels on new and disturbed cable trays in accordance with Section 4 of DOD-STD-2003. Nylon self-locking ties are not an acceptable substitute for cable banding and shall not be used because they can chafe cable jackets and conductor insulation.

Perform an insulation resistance test of each new cable in accordance with Section 2.4.6.1.3 upon completion of banding and prior to connection.

Install new cable identification tags. Color code power conductors per the NEC and install printed wire markers on instrumentation and control leads. Conductor and cable identifiers shall be consistent with the installation drawing. Ensure that lugs are tightly crimped to leads and are of the correct size and type.

Connect each cable in accordance with the installation drawings. Torque all electrical connections. Test each new circuit for continuity.

Prime and paint all new and disturbed surfaces.

2.4.6.1 Acceptance Testing

2.4.6.1.1 Test Performance

All acceptance tests shall be performed in the presence of a Coast Guard inspector or COR.

Provide a written report to the Coast Guard inspector of all test results within one week of test completion.

2.4.6.1.2 Conductor Resistance Test

Perform a conductor resistance test of any paralleled power conductors to ensure that load current will divide evenly during operation.

2.4.6.1.3 Insulation Resistance Test

Accomplish insulation resistance tests of all new and disturbed electric cables, transformers, lighting fixtures, and heaters using a direct current megohmmeter (Megger®). Test voltage shall be as shown in Table 2-1. Do not test systems with voltage sensitive electronics unless such components are disconnected or completely isolated by a disconnect switch or removed fuses.

Temperature corrects all insulation resistance readings to 25°C using the nomograph below.

Record meter reading, winding temperature, and corrected insulation resistance for each measurement taken.

The following formula can be used as a cross check on the nomograph temperature correction

Table 2-3:

Table 2-1: Insulation Resistance Test Voltages

Operating Voltage (VDC or VAC)

Test Voltage

(VDC)

24-50 50 to 100

51-150 100 or 150

151-250 250

251-500 500

501-1000 1000

1001-2500 2000 or 2500

2501-13700 5000

The minimum acceptance readings of conductors to ground and between conductors shall be as shown in Table 2-2 below. When only cable insulation resistance is being measured (no load or control equipment in the circuit under test), the resistivity shall be greater than the value shown in Table 2-2 for the cable temperature. Resistivity is calculated by multiplying the effective conductor length under test by the measured resistance, uncorrected for temperature.

Effective length is calculated by adding the length of all conductors to which test voltage is applied during the insulation resistance measurement.

Table 2-2: Minimum Acceptable Insulation Resistance

Circuit

Total Resistance

(M)

Resistivity (M-ft)

40ºF 70ºF 140ºF

Lighting 0.5 5500 920 95

Power 1.0 5500 920 95

Instrumentation & Control 1.0 5500 920 95

Audio & Telephone 0.05 2200 380 40

)25(0305.0

25 10 −= T

TRR

where R 25 is the corrected insulation resistance

R T is the uncorrected insulation resistance

T is the winding temperature (°C)

2.4.6.1.4 Operability Test

Cycle each new component to verify operability.

2.4.6.1.5 Clearance Check

For newly installed equipment, open all doors and remove covers to verify adequate servicing access and interference-free operation. Similarly, verify that access to existing nearby equipment is not adversely affected by a new installation.

2.4.6.1.6 Operational Test

Verify proper operation of the components or systems affected by the invoking work item.

During this testing, run the equipment through its full range of capabilities in all configurations and operating modes.

2.4.6.1.7 Enclosure Tightness Tests

Perform a water leakage test of each new, plugged, or disturbed outdoor penetration and closure in accordance with the following:

• The water hose nozzle shall be no less than ½ inch in diameter and the pressure at the nozzle shall be at least 50 psig.

• Prior to testing, conduct a survey to assure that appropriate steps and precautions have been taken to prevent damage caused by spillage or spray of fluids on components and equipment adjacent to the test area.

• Hold the nozzle within 10 feet of the structure under test and direct the water stream in the manner most likely to reveal leakage. The acceptance criteria for the water hose test shall be no evidence of water on the opposite side of the tested structure.

2.4.6.1.8 Electrical System Acceptance Testing

Electrical system acceptance testing shall be accomplished at the power mounds. A resistive/reactive load bank shall be used.

Table 2-3: Nomograph Temperature Correction

2.5 Shore Tie Standards – Small Boats

All vessels less than 65 feet in length are classified as small boats and are identified solely by hull number.

Electrical shore ties for small boats have been standardized on Russellstoll®. Replacement of the existing shore ties to meet this standard shall be accomplished as part of normal maintenance/recapitalization actions unless safety concerns necessitate more immediate replacement. Electrical shore ties to support new assets shall be constructed as part of the homeport preparation process using funds appropriated for the acquisition of the new vessel.

The tables in Appendix A categorize Low-Power Cutters (LPC), High-Power Cutters (HPC), and small boats by voltage and by SFLC Product Line, with reference to the associated one-line diagrams.

2.5.1 Table A-1Main Disconnect Requirements

2.5.1.4 Disconnect Switches

The receptacle(s) serving a single vessel shall be on their own disconnect switch(es) or circuit breaker(s) to allow an afloat unit to disconnect and connect to shore power without affecting other vessels. For vessels with non-continuous loads only, a 100% rated breaker is required.

The long-time delay setting of each dockside circuit breaker shall be no greater than the smaller of the following:

• The total ampacity of the shore-to-ship cable(s) connected to it.

• The ampacity of the feeder between the associated shore power receptacle(s) and the in-hull circuit breaker, including the rating of any step-down transformer.

2.5.1.5 Metering

Shore power for small boats shall be metered in accordance with the Advanced Metering

Infrastructure CSTO, SILC-CSTO-36-11 31 17 11-01. A single master meter is required to meter all small boat shore ties located at each pier/wharf supporting small boats. Individual metering of small boat shore power is not required.

2.5.2 Feeder Requirements

2.5.2.1 Circuit Breakers/Disconnects

All current-carrying conductors to include the neutral shall be switched.

Circuit breaker parts that are susceptible to the growth of fungus shall be varnished. Linen, cellulose, untreated wood, jute, leather, cork, paper, cardboard, organic fiberboard, and organic felt or products containing these materials shall be considered fungus nutrients.

For small boats where single-phase power is required and a two-pole breaker is installed, the second pole shall not be used and shall be labeled as such.

2.5.2.2 Raceway and Conductors

See section 2.4.5 for requirements on raceway and conductors.

2.5.3 Electrical Receptacle and Plug Requirements

Shoreside power receptacles shall be equipped with a mechanical interlock that blocks insertion and removal of the plug when the receptacle is energized. Russellstoll® mechanically interlocked receptacles are the standard for small boats. Refer to Figure F-6 for an example of a small boat receptacle.

A mechanical interlock shore tie receptacle, like the Russellstoll® MaxGard, is a circuit breaker interlock that prevents installation or removal of a plug while the integral disconnect circuit breaker is closed. A rugged cast aluminum housing with electrostatic epoxy coating and stainless-steel hardware enables heavy duty marine use and exposure to salt-laden moisture.

Waterproof construction with O-ringed interior components provides environmental separation, watertight mated or unmated. A heavy on/off handle adds mechanical-to-electrical (CB) interlock functionality. All receptacles and connectors shall have a gated rotating disk (gated deadfront) https://uscg.sharepoint-mil.us/:b:/s/silc_spo/ESD/configurationManagement/EdiNIFXG7KNLo8sqvObtsMsB2QII9vF7u_FbRvBZqZljBg?e=ZgIw9d https://uscg.sharepoint-mil.us/:b:/s/silc_spo/ESD/configurationManagement/EdiNIFXG7KNLo8sqvObtsMsB2QII9vF7u_FbRvBZqZljBg?e=ZgIw9d on the face of the interior, which engages upon insertion. Standard delayed-action pull, and withdrawal offers all plugs an explosion-proof rating. Pin and sleeves shall be marine-grade

CDA brass, and 200- and 400-amp pins and sleeves are silver plated. Twenty-four single-rated device polarizations ensure exact voltage, frequency, and phase differentiations. There are two optional pilot/control pins for contactors, load monitoring circuits, shunt trip, and any other communication function if needed. Grounding of the mechanical interlock shore tie receptacle shall be accomplished through a separate center ground (earth) make-first and break-last pole on all devices for complete system ground to protect from possible arcing.

When convenient, multiple small boat receptacles can be mounted on a single stanchion mount to save space along the shore dock.

Emergency electrical disconnects shall be provided for each small boat receptacle per latest edition NEC 555.36(C). See Figure F-7.

2.5.3.1 Standard Small Boats

Grounded service shall be provided to each standard small boat (e.g., 45-foot Response Boat –

Medium (RBM), 47-foot motor lifeboat (MLB), and 49-foot Buoy Utility Stern Loading (BUSL) boat). The shore tie enclosure shall house a Russellstoll® mechanically interlocked shore tie receptacle, as shown in Table A-1.

Where several vessels of the same class operate within a geographical area, it may be advantageous to outfit all homeports with the same receptacle.

2.5.3.2 Non-Standard Small Boats

Shore receptacles for non-standard small boats are not standardized.

All shore ties supporting non-standard small boats shall comply with NEC Article 555, Marinas, Boatyards, and Commercial and Noncommercial Docking Facilities. Consult MSPL for support for non-standard shore receptacles.

2.6 Shore Tie Standards – Cutters

Vessels 65 feet in length and longer are generally classified as cutters, which are further broken down into the categories of LPCs and HPCs. Each cutter has a name as well as a responsible

SFLC product line. Cutters are assigned a permanent crew with an Officer in Charge (OIC) or

Commanding Officer (CO). The specific shore tie technical requirements for each cutter class are available from the SFLC and are summarized in Appendix A.

Electrical shore ties for high-power cutters are standardized on MIL-SPEC 400-amp receptacles and are normally provided using the PC&I funds set aside to modify/upgrade waterfront facilities to support the new cutters. Refer to Table A-3.

Electrical shore ties for cutters are standardized, all utilizing Russellstoll® receptacles for high-power cutters or NATO receptacles for low-power cutters. Replacement of the existing receptacles to meet this standard shall be accomplished as part of normal maintenance/recapitalization actions. Receptacles and enclosures to support new assets shall be constructed as part of the homeport preparation process using funds appropriated for the acquisition of the new vessel. Refer to Tables A-2 and A-3.

In order to obtain favorable utility rates, shore power systems shall be equipped with static or automatic power factor correcting capacitors for any electrical shoreties over 1-MVA (1-MW).

Capacitor banks shall be equipped with discharge resistors that automatically reduce plate voltage to less than 50 volts within one minute of de-energization. For services intended for use by cutters with paralleling capabilities, the system shall be designed to prevent operation with a leading (capacitive) power factor.

Ungrounded delta 450V, three-phase, three-wire, 60 Hz power shall be the Coast Guard shore tie standard for cutters operating in salt water or the Great Lakes. This category is further subdivided into low-power cutters and high-power cutters. The desired hotel voltage as measured at the cutter switchboard with normal port loads should be 450V; therefore, the source voltage may be higher than 450V. Field adjustments may be made to the primary transformer taps per section 2.6.3.4.1. See Table A-2.

Ungrounded delta 230V, three-phase, three-wire, 60 Hz power shall be the Coast Guard shore tie standard for river (WLR), inland waterway (WLI), and construction (WLIC) tenders operating predominantly in fresh water. See Table A-2.

2.6.1 Main Disconnect Requirements

2.6.1.1 Disconnect Switches

The receptacle(s) serving a single vessel shall be on their own disconnect switch(es) or circuit breaker(s) to allow an afloat unit to disconnect and connect to shore power without affecting other vessels. For non-continuous loads, a 100% rated breaker is required.

The long-time delay setting of each dockside circuit breaker shall be no greater than the smaller of the following:

• The total ampacity of the shore-to-ship cable(s) connected to it.

• The ampacity of the feeder between the associated shore power receptacle(s) and the in-hull circuit breaker, including the rating of any step-down transformer.

2.6.1.2 Metering

Shore power to each cutter shall be separately metered in accordance with the Advanced

Metering Infrastructure CSTO, SILC-CSTO-36-11 31 17 11-01.

2.6.1.3 Phase rotation

Phase rotation for shore power AC systems shall follow the NEC arrangement.