Amendment 01 Questions and Answers.pdf

12405B22R0019 Amendment 01– Questions and Answers

The answers Highlighted in Yellow pertain to the existing MCC’s.

This is not what we are specifying for the new MCC’s.

a. Page 4 of 8 in Statement of Work states Red Line update existing original installation drawings/plans.

Question: When will the contractor be supplied the existing drawings prior to bid for evaluation.

Answer: The available drawings/diagrams are posted as attachments to Amendment 01.

b. Page 4 of 8 question (5) state MCC to required specifications, and to match existing labeling of existing MCC for fume hoods or exhaust fans being powered by MCC.

Question for Owner are:

(1) How many sections is the existing MCC.

Answer: 6

(2) What is the current supply voltage on the existing MCC.

Answer: 208-Volt

(3) What is the phasing of existing MCC.

Answer: 3 phase, 4 wire (4). What is the amperage of the MCC?

Answer: 600

(4) What is the over current protection method.

Answer: Remote circuit breaker.

(6) Is a main breaker in the existing MCC.

Answer: No.

(7) What is the existing makeup of the MCC buckets, i.e.

(7a) Is there a Main Breaker and if yes what size? And

Answer: 16 each-100 AF, 20 AT. Note: The drawings show 15 amp trip, but they are actually 20 amp.

(7b) What is the Existing MCC AIC breaker rating

Answer: 65K

(7c) What are the Existing Fuses size and rating, Answer: No Fuses (7d) What are the Existing Motor Stater size and what are controls configuration.

Answer: Size 1. For the new MCC’s An Ethernet connection needs to be provided for each drive. The connection to the provided Ethernet will be done at a later date.

(8) Question: What AIC rating is Exiting on the main bussing?

Answer: 42K

(9) Question: Is main bussing copper or aluminum?

Answer: Tin Plated copper

(10) Question: What is the NEMA rating of existing MCC Answer: NEMA 1

1. Are manufacturers such as Siemens, Eaton, GE, Etc. approved equipment manufactures for the replacement MCCs?

Our stated preference, as indicated in the SoW, is that the supplied MCC be of the same specs and manufacturer as the one that’s being replaced as all other MCC’s are made by the same manufacturer so that makes it easier to install and maintain. Should you wish to propose a substitute, it must be of equal or superior quality and comparable price to be considered in your proposal.

2. Can you provide any as builts drawings for the existing MCCs being replaced that shows all of the conduit and conductor sizes for the equipment being fed from the base bid MCC and the option #1 MCC?

The Lab does not have any as-builts for the existing MCC’s. Proposing alternate MCC manufacturers may incur additional costs and time constraints on the part of the Contractor as it will not be considered a “differing or unknown site condition” given that a site visit was held and the manufacturer, type, and specs of the MCC to be replaced was clearly available for inspection and observed to be inspected by all attendees present.

3. Can you please confirm the working hours required for this work? It states "work should be scheduled to be performed during and after normal working hours, on the weekends, or during Federal Holidays to minimize disruption to research" Are normal working hours going to be allowed 7am-3:30pm? Will night work be allowed from 4:30pm - 6am? Will all hours of weekend work be allowed?

Working hours are stated in the SoW. If other times are desired, they will have to be coordinated with the Laboratory personnel so that research is not affected in any way. Weekend hours to minimize disruption are possible if the Lab agrees with the request.

4. Can the duration of the project be extended to 300-365 days due to long lead time on equipment required for the project?

The Contractor who is awarded the contract can request extension from the Contracting Officer once they know the delivery date of the MCC and figure out the time they need to install it afterward.