0001 - Electrical Redesign - Questions 11 and 70.pdf
PDF 3 MB Posted
- Attached to
- Y1LZ--TIERED SET-ASIDE - Parking Ramp Expansion Minor Construction - Buffalo VAMC 528-375
- Solicitation number
- 36C77626R0046
About this file
This document is a technical instruction set and visual guide for electrical modifications to a federal facility's infrastructure, specifically detailing conduit rerouting and panel installation work.
The project involves reconfiguring existing electrical infrastructure between Building #1 and a parking ramp electrical room. Key work items include: (1) swapping fire alarm and BLH-2 feeder conduits within an existing pullbox located in Room E-10, with installation of a new divider to separate low-voltage from high-voltage systems; (2) running new 4-inch conduit above ceiling from the E-10 pullbox to Room E-25 (electrical room housing ATS-31 automatic transfer switch); (3) removing the existing 100-amp disconnect and installing a new 200-amp heavy-duty fused disconnect on existing unistrut at the ATS-31 location, with installation of a 12"x12" junction box above it; (4) extending the new 4-inch conduit to a new electrical panel SPP-1 in the parking ramp electrical room to replace an existing panel; and (5) cable pulls and reconnection work coordinated with Simplex/Johnson Controls for fire alarm systems. The feeder cable between new panel SPP-1 and existing ATS-31 shall be 4#250 + #4G (copper), not 4#4/0 + #4G as shown on plan sheets. All outages require 30-day advance coordination with the VA and must occur outside normal operating hours or weekends. The contractor is responsible for finalizing all connections, testing, and providing engraved acrylic labels identifying cabling types on the E-10 pullbox cover.
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Text version
Location of underground conduit between BLDG #1 and the Parking Ramp. Location of pullbox in
BLDG 1.
Existing pullbox in Room E-10 (cover off):
Existing Conditions showing existing fire alarm cable and feeder for panel BLH-2:
Proposed changes required to utilize existing conduit (fire alarm and feeder for BLH-2 swap conduits, add new divider to separate low voltage from high voltage):
Run new 4” conduit above ceiling from E-10 (pullbox) to E-25 (electrical room – ATS-31):
ATS-31 located in room E-25 (power source for proposed new panel SPP-1, to be located in the parking ramp electrical room):
Remove existing 100A disconnect and install new 200A heavy duty fused disconnect on existing unistrut. Connect new 4” conduit.
Install new junction box above new 200A heavy duty fused disconnect:
Proposed new disconnect and junction box configuration:
Panel SPP-1 in existing parking ramp electrical room (to be removed – refer to project electrical drawings):
Panel SPP-1 to be removed and replaced with a new panel – extend 4” conduit to new panel:
Updated one line diagram:
Additional Notes:
• Existing feeder cables for BLH-2: cables to be pulled out, and then pulled back in through the alternate conduit.
• Existing and fire alarm wire: to be pulled out, and then pulled back through the alternate conduit. Contractor shall coordinate with Simplex / Johnson Controls when disconnecting and reconnecting, including final connections and testing.
• Both the fire alarm cable and feeder for BLH-2 may be re-used, as long as the cables / wires are not damaged when pulled back out.
• Swapping BLH-2 and fire alarm conduits will require outages. Outages and pulling wire / cable will need to occur outside of normal operating hours, or over weekends, as approved by the
VA. All outages are required to be coordinated with the VA a minimum of 30 days in advance of the outage.
• Cable size between new panel SPP-1 and existing ATS-31 shall be 4#250 + #4G and not 4#4/0 +
#4G as indicated on plan sheet E-601. All electrical cabling shall be copper.
• Contractor will remain responsible for finalizing all connections and testing.
• Contractor is responsible for providing labels on the cover of the existing pullbox located in room E-10. Labels shall read ‘fiber optic’, ‘Fire Alarm’, ‘Data’, ‘High Voltage’, ‘High Voltage’, ‘High Voltage’. Contractor to secure labels to the cover to identify the location and type of cabling / wires. Labels shall be1 /16" thick plastic engraved acrylic plates or VA approved equal. Labels shall be positively secured to covers.
• New electrical panel SPP-1 shall not be mounted directly to concrete walls within the existing electrical room. Panel shall be mounted on galvanized or stainless steel mounting brackets, such as Unistrut.
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