Are camlock connectors safe for a public area??

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zbang

Senior Member
Location
Roughly 5346 miles from Earls Court
The photo where they're locked off looks perfectly safe. No, not a problem. Usually I see camlock installations outside of what's generally public space and with lockable disconnects. IME, most users actually understand concept of leaving them de-energized when not connected.
 
iwire

iwire

Moderator
Staff member
Location
Massachusetts
Not withstanding the common usage their are some rules for cam locs

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
Click to expand...


(P) Qualified Personnel. The routing of portable supply
conductors, the making and breaking of supply connectors
and other supply connections, and the energization
and de-energization of supply services shall be performed
performed
by qualified personnel, and portable switchboards
shall be so marked, indicating this requirement in
a permanent and conspicuous manner.

Exception: A portable switchboard shall be permitted to
be connected to a permanently installed supply receptacle
by other than qualified personnel, provided that the supply
receptacle is protected for its current rating by an overcurrent
device of not greater than 150 amperes, and where the
receptacle, interconnection, and switchboard comply with
all of the following:

(a) Employ listed multipole connectors suitable for the
purpose for every supply interconnection

(b) Prevent access to all supply connections by the
general public

(c) Employ listed extra-hard usage multiconductor
cords or cables with an ampacity not less than the load and
not less than the ampere rating of the connectors
Click to expand...
.
 
steve66

steve66

Senior Member
Location
Illinois
Occupation
Engineer
iwire said:
:D

Or we could just keep doing what we have been doing ........ :cool:
Click to expand...

I assume that means you think they are OK.

I don't see anything in the code sections you listed saying they are prohibited. It looks like the labeling on the panel covers all the requirements.
 
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