The main switch and branch switches
shall be of the fusible bolted pressure type with a
maximum ampacity as shown on the drawings. Switches
shall be dead front and equipped with Quick-Make,
Quick-Break, tease-proof operators. An insulated bar
will be used to connect the operator mechanism to the
crossbar in order to keep ground potential out of the
arcing zone. The operating handle shall have
provisions for padlocking in the open position with at
least three padlocks.
Face barrier must be transparent to
allow visible blades. Optional viewing windows may be
provided in enclosure fronts.
Switches rated 1200 amp and larger
shall be capable of accepting fuses of smaller ampere
rating so fuses can be sized to the actual load
allowing for optimum response during an arc flash
event. Switches rated 1200 amp and larger shall also
be capable of being equipped with a shunt trip
mechanism suitable for use with optional arc flash
mitigation system equipment.
Every switch must have a NRTL label
and shall be marked as suitable for use on a circuit
capable of delivering 200,000 RMS symmetrical amperes.
All bolted pressure contact switches
shall be manufactured by BOLTSWITCH, INC., a wholly
owned subsidiary of SOCOMEC.