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PA, PH, PC, PX and PE Circuit Breakers
Products sold and installed in the USA and Canada
There are 24 carriage bolts used to attach the above breakers to bus bars (4 bolts per pole, line and load).
The proper torque is 240 lb-in (27 N-m).
See below drawing as a reference (from bulletins 48040-189-06 and 48040-940-03).