A00807-608634.pdf

Massachusetts Department Of Transportation Highway Division Proposal No. 608634-134590

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DOCUMENT A00807

EVERSOURCE SPECIAL PROVISIONS

Massachusetts Department Of Transportation Highway Division

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*** THIS PAGE IS INTENTIONALLY LEFT BLANK ***

13EVERSOURCE ENERGY CONSTRUCTION STANDARD

APPROVED

ORIGINAL

CABLE RISER GUIDE

9/5/12

8/6/91

DTR 12.010

MINIMUM 12″

SCHEDULE

40 PVC

Notes

1. The first 10 feet of the riser conduit is to be sunlight resistant Schedule 80 PVC installed, bell end down. When

Schedule 80 PVC is used for UG, the bell end is installed over the steel bend at the base of the pole and is sealed with putty SC 508683. When connecting two pieces of steel conduit, fittings shall be sealed with pipe compound SC 506550.

2. a. If the UG portion of the conduit is steel, the bend is to be connected by a steel coupling.

b. If EB or DB type conduits are used, connect conduit to the steel bend with a PVC coupling (socket female).

3. From the top of the Schedule 80 conduit, extend upward with Schedule 40 PVC conduit, bell end down.

4. The top of the conduit shall extend at least 2 inches above the secondary or neutral attachment height (see DTR 04.047).

In an all conduit installation, the top of the conduit shall be sealed with putty SC 508683 and jute SC 553408, to prevent water from entering.

5. To select proper conduit size, see DTR 12.011, check overall cable(s) diameter (see DTR’s 32.019 thru 020).

Conduit Cable Diameter Size in Inches Range in Inches

2 0.5 1.4 3 1.4 2.4 4 2.4 2.9 5 2.9 4.0 6 4.0 5.0

6. Attach 2 1/2″ x 2 1/2″ adhesive backed label, “WARNING, UNDERGROUND ELECTRIC CABLE” SC 565484 approximately 6 feet above ground on the riser conduit (see SPC L 019 in Material Book).

7. Preferred location for riser placement is on field side of the pole opposite the direction of traffic. (Road side of pole opposite the direction of traffic is reserved for road crossings.)

8. Contact the toll free telephone number to locate buried cables before driving ground rods.

9. Steel conduit shall be grounded. If the steel elbow is installed with nonmetallic conduit, it shall also be grounded. Use 5/8″ x 8′ galvanized steel ground rod.

CABLE GRIP

ATTACHMENT

SCHEDULE 80

PVC NOTE 1

18″ MIN

BELOW 8′

36″ MAX

ABOVE 8′

60″ MAX

6′

NOTE 6

FINISHED GRADE

DIRECT BURIED CABLE

NOTE 4

2″

SECONDARY

OR NEUTRAL

See DSEM Section 07.82 for trench specifications

90° STEEL BEND

(ELBOW) #6 OR #4

COPPER WIRE

GROUND

CLAMP

GROUND ROD

NOTE 9

4″ MIN

UG CONDUIT INSTALLATION

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ORIGINAL COVERS − MANHOLE − ENERGY RELEASE − DUCTILE IRON

32” DIAMETERAPPROVED

10/17/22 EVERSOURCE ENERGY CONSTRUCTION STANDARD SPC CVR-007 0

Notes

1. The ductile iron shall conform to ASTM A536−2019.

2. Design loading shall be in accordance with the latest edition of AASHTO HS25-1983.

3. Bearing surfaces of cover shall be machine finished with tolerance of 1/16 inch +0 inches.

4. Five 1−1/4−inch diameter holes 72 degrees apart.

5. “EVERSOURCE ELECTRIC” letters 2−1/2 inches high.

6. Eversource item number #620171 shall be cast in cover at the edge to the right of EVERSOURCE ELECTRIC logo.

7. Foundry name or insignia and date (year when manufactured) shall be cast in the underside of cover.

8. The 32 inch cover fits into the 30 inch frame. Weight 32 inch cover approximately 191 pounds.

½” – 13 SS pent head bolt covered by plastic (4) pick holes

21” Bolt Circle

NOTE 4

NOTE 5

Section A-A

Ductile Iron Locking Arm

¼” NEOPRENE GASKET

DETAIL B

NOTE 7 (1) ½” – 13 SS Hex Bolt, (2) SS Spacers,

(1) SS lock nut

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SPC M 023

MANHOLE PRECAST REINFORCED CONCRETE

5� 0� x 10� 0� x 7� 0� INSIDE

10EVERSOURCE ENERGY

APPROVED

ORIGINAL

MATERIAL SPECIFICATION

11/1/01

8/23/73

S ee

D et ai ls a nd

N o te s on re ve rs e si de

S E

C T

IO

N

B B

N O

T E

S E

C T

IO

N

A A

8″ 6″

8′ 2″

7′ 0″

4″

N O

T E

N O

T E

5P L

A N

V

IE

W

0″

0″

6″ 6″

6″

A

A

6″

6′ 0″

5′ 0″

N O

T E

B B

N O

T E

N O

T E

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SPC M 024

MANHOLE PRECAST REINFORCED CONCRETE

5� 0� x 10� 0� x 7� 0� INSIDE

10EVERSOURCE ENERGY

APPROVED

ORIGINAL

MATERIAL SPECIFICATION

11/1/01

8/23/73

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1″ 6″

Notes

1. Manhole shall be designed for the following loads:

a. The roof shall be designed for AASHTO HS20 1996 direct wheel load.

b. The walls shall be designed for the summation of the following:

1) Soil pressure of not less than an equivalent fluid pressure of 33 pcf.

2) Hydrostatic pressure of 5 feet measured from the base of the manhole.

3) A surcharge of 2.5 feet of soil weighing 120 pcf.

c. The floor shall be designed to resist the hydrostatic pressure resulting from the 5 foot head called for in 1.b.2 above.

2. Concrete and concrete design shall be in accordance with ACI 318 1999.

3. Concrete shall have a minimum and maximum 28 day strength of 4000 and 5000 psi respectively.

4. Steel reinforcing bars shall conform to ASTM A615 1992 Grade 40 or 60. Welded wire mesh shall conform to

ASTM A185 1997 or A497 1999.

5. Pulling eyebolts, with a minimum 8000 pound pulling strength, shall be installed adjacent to window knockouts at eight places.

6. Zinc alloy inserts 1/2 inch 13 x 1 1/2 inch shall be installed at 40 places.

7. Openings and knockouts shall be clear of reinforcement.

8. Construction joint shall be sealed with asphalt cement or equivalent.

9. Manufacturer’s identification and month/year when manufactured shall be legibly marked in/on concrete in the side of the 38 inch opening.

6″

2″

2 1/2″

NOTE 8

INSIDE OUTSIDE

INTERFACE

SEALED WITH

ASPHALT

CEMENT

1″ x 8″ SHOULDER

EYE BOLT PER

NEMA/ANSI

C135.4 1987

4″ x 4″ x 1/4″

SQUARE WASHER

1 1/8″ HOLE PER

NEMA STANDARD

PH 10 1977

JOINT DETAIL WINDOW KNOCKOUT DETAIL PULLING EYEBOLT DETAIL

45°

3″

3/4″30°

6″

3″

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ORIGINAL

CONDUIT BANK CONSTRUCTION 05/29/75

APPROVED

08/17/23 EVERSOURCE ENERGY CONSTRUCTION STANDARD DTR 73.209 6

Figure Dimensions (inches)

4” Duct 5” Duct 6” Duct W H S W H S W H S

1 19 2 2 19 21 2

2A 36 2 3 19 2

3A 21 2 4 19 38 2

4A 36 21 2 5 38 2

5A 36 2 Notes

1. At manholes, conduit banks shall be according to Figures 1, 2, 3, 4, or 5.

2. Minimum cover from top of a conduit bank to the pavement or earth surface shall be:

a. State highways 36 inches

b. Railroad tracks – 60 inches

c. 24 inches

3. In the conduit run between manholes if obstructions are encountered or to reduce trench depth, Figures 2A, 3A, 4A, or 5A are permissible.

4. Concrete shall be 2500 psi, ½-inch maximum stone, 6” to 9” slump of such consistency that spading will ensure the flow of concrete between and under the individual ducts, but not so wet as to float the ducts. For tier buildup, construction of a stiffer consistency should be used.

PREFERRED:

2” S

3”

3”

H

W

FIGURE 1

2 DUCTS

W W

W

W

W W W

W

H

H H

H

H H H

H

S S S S

S S S

S

S S S S

S S

S

2” 2” 2” 2”

2” 2” 2” 2”

3”

3”

3”

3”

3”

3”

3”

3”

3”

3”

3”

3”

3”

3”

3”

3”

FIGURE 2

4 DUCTS

FIGURE 3

6 DUCTS

FIGURE 4

8 DUCTS

FIGURE 5

12 DUCTS ALTERNATE: (see Note 3)

FIGURE 2A

4 DUCTS

FIGURE 3A

6 DUCTS

FIGURE 4A

8 DUCTS FIGURE 5A

12 DUCTS

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DTR 76.011 1

10/11/12

07/20/06

EVERSOURCE ENERGY CONSTRUCTION STANDARD

APPROVED

ORIGINAL CONVENTIONAL UNDERGROUND, PRECAST CONCRETE

VAULT AND MANHOLE INSTALLATION GENERAL

SCOPE This section provides general notes for the installation of precast concrete manholes and network vaults.

GENERAL The following guidelines provides general requirements for the installation of precast concrete manholes and network vaults and is not intended for poured in place structures. The design drawings for the poured in place structures will provide the installation details for the structure. Due to site conditions, additional requirements or guidance may be required. Engineering should be contacted to address site specific conditions.

GENERAL REQUIREMENTS

The excavation shall be prepared such that the vault covers and gratings or manhole frames and covers will be at final grade.

The bottom of the excavation shall be level and adequately tamped to prevent settlement.

Fill and backfill material shall be free from lumps of clay, debris, organic matter, frozen material or other deleterious substances. Fill shall contain no rocks or lumps over four inches in the greatest dimension and not more than 15 percent of the particles shall be larger than two inches in greatest dimension. All fill shall comply with all environmental regulations.

Backfill shall be placed at optimal soil moisture content in lifts no greater than six inch maximum in depth and be thoroughly compacted with a mechanical vibrating compactor so as to prevent settlement of pavement after completion.

Vault and manhole grounding shall be installed prior to compaction of backfill and setting of the vault and shall be installed in accordance with DTR 76.451.

The bottom of the excavation shall be level and free of standing water and large debris.

Precast network vaults, vault grates, frames and covers shall be installed in accordance with

DTR 76.419.

Precast manholes shall be installed in accordance with DTR 76.311 and DTR 76.331.

Manhole construction joints shall be sealed with asphalt cement or approved equal.

Ducts shall enter vault at the windows with bell ends placed flush with the inside of the knock out.

Conduit duct bank shall be grouted/pointed up to ensure a smooth, clean face recessed three inches from the interior walls of the vault.

Radial separation of conduit systems from gas and other lines that transport flammable material shall be not less that twelve inches and should have sufficient separation from gas and other lines that transport flammable material to permit the use of pipe maintenance equipment.

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EVERSOURCE ENERGY CONSTRUCTION STANDARD

APPROVED

ORIGINAL CONVENTIONAL UNDERGROUND

PRECAST, CONCRETE MANHOLE

07/20/06

07/20/06

DTR 76.311

FRAME, MANHOLE

Electric

NOTE 6

NOTE 5

CAST IRON MANHOLE COVER

MANHOLE FRAME

EXTENSION

NOTE 4

PRECAST CONCRETE MANHOLE

EXTENSION

(FOUR SEGMENTS) OR STANDARD

MASONRY BLOCKS

Notes

Manhole grounding shall be installed prior to setting the manhole. Manhole grounding shall be installed in accordance with DTR 76.451.

Customer service underground conduit shall be installation in accordance to DTR 84.811.

Duct banks shall be constructed in accordance with DTR 73.209.

Cast iron extension frames shall be used to adjust grade due to repaving.

Construction joint shall be sealed with asphalt cement or approved equal. Approval shall be provided by Distribution Engineering and Design Distribution Standards.

Standard manhole frame shall be 10 inches in height. A manhole frame of six inch height may be used for lower grades.

See DTR 76.333 for manhole window details.

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EVERSOURCE ENERGY CONSTRUCTION STANDARD

APPROVED

ORIGINAL CONVENTIONAL UNDERGROUND

PRECAST, CONCRETE MANHOLE/VAULT WINDOW DETAIL

07/20/06

07/20/06

DTR 76.333

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MANHOLE/

VAULT

WALL

CONDUIT

MANHOLE/VAULT WINDOW

END BELL CONDUIT

FITTING

NOTES 1, 2 AND 3

CONCRETE ENCASED

DUCT BANK

SEE DTR 73.209

GROUT

NOTE 3

4/0 BARE COPPER

GROUND WIRE

NOTE 5

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WATER STOP CONNECTOR

NOTE 5

CONDUIT

CONDUIT

Notes End Bells shall be installed on all conduit to prevent cable damage due to abrasion due to movement from thermal expansion.

End Bells shall be installed with Manufacturer’s recommended PVC cement.

End Bells shall be installed flush with the inside face of the knockout. The conduit window shall be finished with a grouted or concrete surface flush with the end bell conduit fittings.

Conduits shall be installed level and perpendicular to the manhole/vault wall.

5 4/0 AWG Bare Copper Ground. In high water table areas, the 4/0AWG ground wire shall be sealed using an oil stop compression connector placed within the grouted window opening (See DTR 76.451).

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5/7/12

11/28/84

EVERSOURCE ENERGY CONSTRUCTION STANDARD

APPROVED

ORIGINAL CONDUIT SYSTEM GROUNDING

BELOW GRADE MANHOLES AND VAULTS

Notes Install all loop wires or grounds to 25 ohms or less.

Connect grounds to 4/0 copper bus in manhole or vault.

Install manhole grounding bus with 4 4/0, 4 way compression branch connectors, 516739.

For poured in place manholes, or overcast, grounding tail can be brought into the manhole through the floor.

For all other manholes, bring two (2) tails through duct opening.

DTR 76.451

FIGURE 1 Use when bottom of manhole or vault will be below permanent water level.

Install 4/0 bare copper wire, 30 to 35 feet long, a minimum of six inches below floor.

In areas with a high water table, the 4/0 ground wire should be sealed. This is done by adding a compression sleeve with an oil stop 504601 and placing the sleeve in the concrete or joint grout.

FIGURE 2 Use when bottom of manhole or vault is above permanent water level or in rocky soil.

a. Install two 5/8″ x 8′ copper clad steel ground rods below floor (preferred) or adjacent to walls (alternate).

b. Drive ground rods sideways, if necessary, in rocky soil.

MANHOLE GROUNDING BUS

4/0 BARE COPPER

4/0 BARE COPPER

LOOP, 30 35′

PREFERRED LOCATION

ALTERNATE LOCATION

MANHOLE GROUNDING BUS

4/0 BARE COPPER

NOTE 3

4/0 BARE COPPER

5/8″ COPPER CLADSTEEL-

GROUND ROD

WITH GROUND CONNECTER

FIGURE 1 FIGURE 2

NOTE 4

6″ MIN

NOTE 3

4/0 BARE COPPER

NOTE 4

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