A practical bus tie inspection checklist for power distribution switchboards. It covers prerequisites such as having the latest IFC drawings on site, then outlines the key exchange method using A, B, and C keys for interlocked circuit breakers. Inspectors confirm keys supplied and correct mounting and labeling, capture witness photos, and mark up as built drawings. Three operational lockout tests verify that the bus tie feeder is disabled when C is in the exchange box and that MSB2212 and MSB2202 SPDs cannot be operated when B or A are in exchange. The checklist concludes with onsite sign off.
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