Specifications

COMPLETE REVISION
PIP ELSSG01
October 2004 Design and Fabrication of Low-Voltage Metal-Enclosed AC Power Circuit Breaker Switchgear
Process Industry Practices Page 9 of 14
4.10 Breaker Interlocking and Transfer Schemes
4.10.1 If a breaker interlocking or transfer scheme is indicated on the purchaser’s
PIP ELSSG01D Data Sheet and one-line diagram, it shall be arranged to
operate as indicated on the diagram and any supplemental descriptions
provided.
4.10.2 The transfer scheme shall be disabled if any of the transfer breakers are in
the test position.
4.11 Wiring and Terminations
4.11.1 Control wiring shall be flame retardant, 600-volt, type SIS switchboard
copper wire (or an equivalent in accordance with IEEE C37.20.1 - 2002,
Section 7.1.3.1.4) and shall be continuous from terminal to terminal without
splices and tagged at both ends with permanent plastic sleeve-type wire
markers.
4.11.1.1 Adhesive-type markers shall not be permitted.
4.11.1.2 Locking fork-type lugs shall be provided.
4.11.1.3 Minimum conductor size shall be 14 AWG.
4.11.1.4 Wire markers shall match the supplier’s interconnection drawing.
4.11.2 Wiring for current transformer secondary leads shall be crimped in self-
insulated ring-type lugs and terminated on shorting screw-type terminal
blocks at the first connection after the transformer. Minimum conductor size
shall be 10 AWG unless otherwise indicated on the purchaser’s
PIP ELSSG01D Data Sheet.
4.11.3 All wiring harnesses shall be securely bundled and shall be protected from
rubbing against other parts within the enclosure.
4.11.3.1 Bushings, grommets, or other mechanical protections shall be
provided if wiring is installed through barriers, around edges of
metal sheets, or raceways.
4.11.3.2 Adhesive-type supports shall not be permitted.
4.11.4 Wiring shall be connected to only one side of all field wiring terminal
blocks, and no more than two wires per terminal shall be permitted.
4.11.4.1 Terminal blocks for field wiring to the main and tie breakers and
for any transfer scheme shall not be located in the rear load
terminal compartments.
4.11.4.2 Terminal blocks for field wiring to feeder breakers shall be located
in the rear load terminal compartments.
4.11.5 Terminal blocks shall be supplied and clearly marked for wiring that will be
installed by the purchaser, including wiring between shipping sections.
4.11.6 Spare terminal blocks shall be provided in accordance with the purchaser’s
PIP ELSSG01D Data Sheet.