520.53 Construction and Feeders. Portable switchboards
and feeders for use on stages shall comply with 520.53(A)
through (P).
(K) Single-Pole Separable Connectors. Where single-pole
portable cable connectors are used, they shall be listed and of
the locking type. Sections 400.10, 406.7, and 406.8 shall not
apply to listed single-pole separable connectors and singleconductor
cable assemblies utilizing listed single-pole separable
connectors. Where paralleled sets of current-carrying,
single-pole separable connectors are provided as input devices,
they shall be prominently labeled with a warning indicating
the presence of internal parallel connections. The use of
single-pole separable connectors shall comply with at least
one of the following conditions:
(1) Connection and disconnection of connectors are possible
only where the supply connectors are interlocked
to the source and it is not possible to connect or disconnect
connectors when the supply is energized.
(2) Line connectors are of the listed sequential-interlocking
type so that load connectors shall be connected in the
following sequence:
a. Equipment grounding conductor connection
b. Grounded circuit conductor connection, if provided
c. Ungrounded conductor connection, and that disconnection
shall be in the reverse order
(3) A caution notice shall be provided adjacent to the line
connectors indicating that plug connection shall be in
the following order:
a. Equipment grounding conductor connectors
b. Grounded circuit conductor connectors, if provided
c. Ungrounded conductor connectors, and that disconnection
shall be in the reverse order