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You are correct - it is not allowed. Power for motion sensors are considered to be control wiring. As such they are governed by Article 700 of the electrical code. The specific code reference is listed below. Here is the full article in the code for your reference. Long story short - anything over 600v cannont be in the same raceway or enclosure as systems 600v or less. That is the cutoff point. Any class 2 or 3 circuits connot be run in any cabinit or raceway with any other systems.
300.3 (C) States:
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.
Exception: For solar photovoltaic systems in accordance
with 690.4(B).
FPN: See 725.136(A) for Class 2 and Class 3 circuit
conductors.
Now if you have any circuits rated as Class 2 or 3 - they cannot be in the same enclosure or raceway.
725.136 Separation from Electric Light, Power, Class 1,
Non–Power-Limited Fire Alarm Circuit Conductors,
and Medium-Power Network-Powered Broadband
Communications Cables.(A) General. Cables and conductors of Class 2 and Class 3
circuits shall not be placed in any cable, cable tray, compartment,
enclosure, manhole, outlet box, device box, raceway,
or similar fitting with conductors of electric light,
power, Class 1, non–power-limited fire alarm circuits, and
medium-power network-powered broadband communications
circuits unless permitted by 725.136(B) through (I).
(B) Separated by Barriers. Class 2 and Class 3 circuits
shall be permitted to be installed together with the conductors
of electric light, power, Class 1, non–power-limited fire alarm
and medium power network-powered broadband communications
circuits where they are separated by a barrier.
(C) Raceways Within Enclosures. In enclosures, Class 2
and Class 3 circuits shall be permitted to be installed in a
raceway to separate them from Class 1, non–power-limited
fire alarm and medium-power network-powered broadband
communications circuits.
(D) Associated Systems Within Enclosures. Class 2 and
Class 3 circuit conductors in compartments, enclosures, device
boxes, outlet boxes, or similar fittings shall be permitted
to be installed with electric light, power, Class 1, non–
power-limited fire alarm, and medium-power networkpowered
broadband communications circuits where they
are introduced solely to connect the equipment connected
to Class 2 and Class 3 circuits, and where (1) or (2) applies:
(1) The electric light, power, Class 1, non–power-limited
fire alarm, and medium-power network-powered broadband
communications circuit conductors are routed to
maintain a minimum of 6 mm (0.25 in.) separation
from the conductors and cables of Class 2 and Class 3
circuits.
(2) The circuit conductors operate at 150 volts or less to
ground and also comply with one of the following:
a. The Class 2 and Class 3 circuits are installed using
Type CL3, CL3R, or CL3P or permitted substitute
cables, provided these Class 3 cable conductors extending
beyond the jacket are separated by a minimum
of 6 mm (0.25 in.) or by a nonconductive sleeve or
nonconductive barrier from all other conductors.
b. The Class 2 and Class 3 circuit conductors are installed
as a Class 1 circuit in accordance with
725.41.
(E) Enclosures with Single Opening. Class 2 and Class 3
circuit conductors entering compartments, enclosures, device
boxes, outlet boxes, or similar fittings shall be permitted
to be installed with Class 1, non–power-limited fire
alarm and medium-power network-powered broadband
communications circuits where they are introduced solely
to connect the equipment connected to Class 2 and Class 3
circuits. Where Class 2 and Class 3 circuit conductors must
enter an enclosure that is provided with a single opening,
they shall be permitted to enter through a single fitting
(such as a tee), provided the conductors are separated from
the conductors of the other circuits by a continuous and
firmly fixed nonconductor, such as flexible tubing.
(F) Manholes. Underground Class 2 and Class 3 circuit
conductors in a manhole shall be permitted to be installed
with Class 1, non–power-limited fire alarm and mediumpower
network-powered broadband communications circuits
where one of the following conditions is met:
(1) The electric light, power, Class 1, non–power-limited
fire alarm and medium-power network-powered broadband
communications circuit conductors are in a metalenclosed
cable or Type UF cable.
(2) The Class 2 and Class 3 circuit conductors are permanently
and effectively separated from the conductors of
other circuits by a continuous and firmly fixed nonconductor,
such as flexible tubing, in addition to the insulation
or covering on the wire.
(3) The Class 2 and Class 3 circuit conductors are permanently
and effectively separated from conductors of the
other circuits and securely fastened to racks, insulators,
or other approved supports.
(G) Cable Trays. Class 2 and Class 3 circuit conductors
shall be permitted to be installed in cable trays, where the
conductors of the electric light, Class 1, and non–powerlimited
fire alarm circuits are separated by a solid fixed
barrier of a material compatible with the cable tray or
where the Class 2 or Class 3 circuits are installed in Type
MC cable.
(H) In Hoistways. In hoistways, Class 2 or Class 3 circuit
conductors shall be installed in rigid metal conduit, rigid
nonmetallic conduit, intermediate metal conduit, liquidtight
flexible nonmetallic conduit, or electrical metallic tubing.
For elevators or similar equipment, these conductors shall
be permitted to be installed as provided in 620.21.
(I) Other Applications. For other applications, conductors
of Class 2 and Class 3 circuits shall be separated by at least
50 mm (2 in.) from conductors of any electric light, power,
Class 1 non–power-limited fire alarm or medium power
network-powered broadband communications circuits unless
one of the following conditions is met:
(1) Either (a) all of the electric light, power, Class 1, non–
power-limited fire alarm and medium-power networkpowered
broadband communications circuit conductors
or (b) all of the Class 2 and Class 3 circuit conductors
ARTICLE 725— CLASS 1, CLASS 2, AND CLASS 3 REMOTE-CONTROL, SIGNALING, AND POWER-LIMITED CIRCUITS 725.136
are in a raceway or in metal-sheathed, metal-clad, non–
metallic-sheathed, or Type UF cables.
(2) All of the electric light, power, Class 1 non–powerlimited
fire alarm, and medium-power networkpowered
broadband communications circuit conductors
are permanently separated from all of the Class 2 and
Class 3 circuit conductors by a continuous and firmly
fixed nonconductor, such as porcelain tubes or flexible
tubing, in addition to the insulation on the conductors.
Hope this helps you out, if you should need anything further please don't hesitate to ask. Have a great night!
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Edited by Joseph on May 9 2008 at 8:40 AM
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