mixed voltage

[Big Guns]

Good Mornig

I know there is an article on mixed voltages say that in a box with switch devices if you exceed a certain voltage between the different voltage you need a divider. Also that you can mix different voltages in a pull or junction box but they have to be identified on cover ? I just can't locate article in code book, I guess working 18 hours a day 7 days a week for a month is making my code knowledge very dull.... :-?:-?

 

[jumper]

Good Mornig

I know there is an article on mixed voltages say that in a box with switch devices if you exceed a certain voltage between the different voltage you need a divider. Also that you can mix different voltages in a pull or junction box but they have to be identified on cover ? I just can't locate article in code book, I guess working 18 hours a day 7 days a week for a month is making my code knowledge very dull.... :-?:-?

This might be what you are looking for.

404.8 Accessibility and Grouping.

(B) Voltage Between Adjacent Devices. A snap switch
shall not be grouped or ganged in enclosures with other
snap switches, receptacles, or similar devices, unless they
are arranged so that the voltage between adjacent devices
does not exceed 300 volts, or unless they are installed in
enclosures equipped with identified, securely installed barriers
between adjacent devices.


300.3
(C) Conductors of Different Systems.
(1) 600 Volts, Nominal, or Less. Conductors of ac and dc
circuits, rated 600 volts, nominal, or less, shall be permitted
to occupy the same equipment wiring enclosure, cable, or
raceway. All conductors shall have an insulation rating
equal to at least the maximum circuit voltage applied to any
conductor within the enclosure, cable, or raceway

 

[iwire]

I will add this as well.

210.5 Identification for Branch Circuits.

(A) Grounded Conductor. The grounded conductor of a
branch circuit shall be identified in accordance with 200.6.

(B) Equipment Grounding Conductor. The equipment
grounding conductor shall be identified in accordance with
250.119.

(C) Ungrounded Conductors. Where the premises wiring
system has branch circuits supplied from more than one
nominal voltage system, each ungrounded conductor of a
branch circuit shall be identified by phase or line and system
at all termination, connection, and splice points. The
means of identification shall be permitted to be by separate
color coding, marking tape, tagging, or other approved
means. The method utilized for conductors originating
within each branch-circuit panelboard or similar branchcircuit
distribution equipment shall be documented in a
manner that is readily available or shall be permanently
posted at each branch-circuit panelboard or similar branchcircuit
distribution equipment.