Addendum_2 _dated_11_Aug_2015.docx

ADDENDUM #2

Repair Electrical Distribution System Area J Project: DKFX 07-0003J Joint Base Charleston – Air Base, SC

11 AUG 2015

1. Drawing E011 states TP550C transformers as 3 x 25kVA. The correct rating of these transformers is 3 x 75kVA. This increases the power rating for building 550 by 150kVA, but shall not change the current design for a 500kVA pad-mounted transformer to feed building 550.

2. Junction box 7A and 7B have been added to drawing E011 for clarity and sizing considerations for conductors and fusing for new switch SW-C11. Switch SW-C11 should be 4 gang to include 3 x 600 amp non-fused switches and 1 x 200 amp fused switch. The 200 amp should feed through the existing J-box 7A to Bldg. 609 (300 kVA).

3. Switch SW-C11 shall provide a 300A non-fused switch connection to junction box J-C8 instead of the 150A fused circuit in the current design. (Dwg E012)

4. Drawing E011 with changes/additions marked in orange is provided as Attachment 1 – 1 page.

5. Delete Specification Section 261300.0020 dated 04/06. Replace with Specification Section 26 13 01 for pad-mounted switchgear. Specification is provided as Attachment 2 – 8 pages.

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