Not quite.
Just like other things in the
theatre (like single-conductor feeders) that require qualified persons, that is the case with Special-Purpose Multi-Circuit Cable Systems.
This is the full list of proposed requirements:
520.68(D) Special-Purpose Multi-Circuit Cable Systems.
Special-purpose multi-circuit cable systems shall comply with the following requirements:
(1) Branch circuits shall be rated at not more than 20 amperes and not more than 150 volts to
ground.
(2) Trunk cable types shall be extra-hard usage (hard service) or hard usage (junior hard service).
(3) The
ampacity of trunk cables shall be determined in accordance with Table 520.44(C)(2).
(4) Trunk cables, breakout assemblies, and multi-circuit enclosures shall be listed.
(5) Section 406.8 shall not apply to multi-circuit, multipole plugs or receptacles that are part of a special-purpose multi-circuit cable
system.
(6) All multi-circuit, multipole connectors shall be clearly marked with the
voltage of the branch circuits serviced by the
connector.
(7) Installation and operation shall be performed by a qualified person(s).
And this is 406.8, which would
no longer apply to these systems based on (5) above:
406.8 Noninterchangeability.
Receptacles,
cord connectors, and attachment plugs shall be constructed such that
receptacle or
cord connectors do not accept an attachment
plug with a different
voltage or
current rating from that for which the device is intended. However, a 20-ampere T-slot
receptacle or
cord connector shall be permitted to accept a 15-ampere attachment
plug of the same
voltage rating. Non–grounding-type receptacles and connectors shall not accept grounding-type attachment plugs.
Finally, do you have a better idea for a solution? If so, bring it on! The industry has steadfastly rejected multiple solutions to prevent intermating of 19-pin connectors operating at different voltages. That left us with the proposed
NEC solution above, which at least makes these systems allowable by the
NEC with the qualified person and listing provisos.
ST