43-49_Q_and_A__cont.pdf

GSA New England Region

U.S. General Services Administration Thomas P. O'Neill, Jr. Federal Building 10 Causeway Street Boston, MA 02222 www.gsa.gov

Replacement of the Motor Control Center (MCC), Manchester, NH

Solicitation GS-01-P-17-BW-C-0007

Questions and Answers

Clarifications

Q43: We have searched the plans and specifications and find no mention of a load bank connection. Where this work is called for in the project documents?

A43: See Dwg E400 Det – the load bank is fed from ATS2, also see dwg E401 Det 1 the load bank is fed from ATS2.

Q44: What size is this load bank?

A44: The existing load bank is a SIMPLX 100KW PF1.0 480 VAC 3 PH 3 wire 60HZ load bank.

Q45: Is the connections mentioned in the amendment a permanent installation or temporary to be removed at the end of the project?

A45: As indicated on sheet E401 Det 1 this is a permanent connection.

GSA New England Region

U.S. General Services Administration Thomas P. O'Neill, Jr. Federal Building 10 Causeway Street Boston, MA 02222 www.gsa.gov

Clarifications cont.

Q46 : Where will the load bank be placed so we can estimate the length of cable and wireway?

A46: As discussed at the site walk and graphically shown on sheets E400 & E401, the load bank is existing. The load bank is to the west of the west generator wall. It is physically approximately 30’ away (contractor must verify this information). There is already 2” conduit to the load bank as noted on sheets E400 & E401.

Q47: Who is providing the load bank?

A47: A noted on E400 & E401 the load bank is existing.

Q48: When will the load bank test be run and by whom?

A48 : The controls of the existing load bank will not be affected.

Q49 : The amendment says to add a circuit breaker, what ampacity? Can a fused disconnect switch be used in lue of a circuit breaker.

A49: As noted in A44 the existing load bank has a 100 KW load capacity. Calculations show

120.28 A @ 480 VAC which implies a 125 A 3 PH breaker. The breaker may be installed in the ATS panel that is being stripped (if code compliant) as noted on sheet E400.