3
Siemens Industry, Inc.
Building Technologies Division
A6V10324662_g_en_US
201
6
-0
1
-
20
Power limited wiring
In compliance with NEC Article 760, all power
limited fire protective signaling conductors must be
separated a minimum of ¼ inch from all of the
following items located within an outlet box:
·
Electric light
·
Power
·
Class 1 or non-power limited fire protective
signaling conductors
To meet the above requirements, the following
guidelines
must be observed
when installing this
input/output module.
If non-power limited wiring is not used
within this outlet box, then these
guidelines do not apply. In that case, be
sure to follow standard wiring practices.
Wiring entering outlet box
All power limited wiring must enter the outlet box
separately from the electric light, power, class 1,
or non-power limited fire protection signaling
conductors. For the FDCIO422, wiring to the
terminal block for line and inputs must enter the
outlet box separately from the terminals for
outputs.
For the output terminals, protection with a fuse is
recommended. Refer to Figures 6 and 9.
WIRING AT THE TERMINAL BLOCKS
Minimize the length of wire entering the
outlet box.
Figure 6 Power Limited Wiring
Separators
The separators must be used when the relay
contacts are connected to non-power limited lines.
Mount the correct separator in the box used
(4
11
/
16
-inch box and 5-inch box). If an extension
ring is used in connection with a 4
11
/
16
-inch
square box an additional separator has to be
mounted in the extension ring.
The separators create two compartments to
separate the wires as shown in Figure 5.
Figure 5 Mounting the separators in the boxes
P
N
N
P
DO NOT USE!
P = POWER LIMITED
N = NON-POWER LIMITED
11
16
1
8
11
16
ADAPTER PLATE
11
16
4 INCH SQUARE BOX
WITH EXTENSION RING
INCHES DEEP (29.5 in³)
1½
