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2.1 Recommended SLC Wiring
Depending on the panel, there are two recommended options for SLC wiring:
•
Twisted, unshielded pair: NFS-320, NFS2-640, NFS-640, NFS2-3030, NFS-3030, LCM-320, LEM-320, LIB-200A, LIB-400.
Maximum resistance 50 ohms per branch. See Table 2.1.
Maximum capacitance: 0.5 µFarads per branch.
•
Twisted-shielded pair: AFP-100, AFP-200, AFP-300/400, LIB-200, AIM-200.
Maximum resistance 40 ohms per branch. See Table 2.2.
To maximize distance on the SLC loop, use the recommended type of wire. Using other wiring types makes the SLC circuit more sus-
ceptible to electrical interference and thus reduces its maximum loop length.
FACP:
Wire Type and Limitations
RECOMMENDED: Twisted unshielded pair, 12 to 18 AWG
(3.31 mm² to 0.82 mm²†). 50 ohms max per length of Style
6 and 7 loops. 50 ohms per branch max for Style 4 loops
NOTE: Twisted-shielded pair or untwisted unshielded wire is not recommended for use with LIB-200A or LIB-400.
RECOMMENDED: Twisted-unshielded pair, 12 to 18 AWG
(3.31 mm² to 0.82 mm²). 50 ohms maximum per length of
Style 6 & 7 loops. 50 ohms per branch maximum for Style 4
loop.
Untwisted, unshielded wire, in conduit or outside of
conduit.
Note: Twisted-shielded pair is not recommended for use with this panel.
Note: Maximum total capacitance of all SLC wiring (both between conductors and from any conductor to ground) should not exceed 0.5 microfarads.
NFS-320, NFS-320SYS, NFS2-640, LEM-320 on NFS2-640, LCM-320/LEM-320 on NFS-3030/NFS2-3030
RECOMMENDED: Twisted-unshielded pair, 12 to 18
AWG (3.31 mm² to 0.82 mm²). 50 ohms, maximum per
length of Style 6 & 7 loops. 50 ohms per branch maximum
for Style 4 loop.
Untwisted, unshielded wire, in conduit or outside of
conduit.
Twisted, shielded pair
Note:
• Shields must be isolated from ground.
• Shields should be broken at each device.
Note: Maximum total capacitance of all SLC wiring (both between conductors and from any conductor to ground) should not exceed 0.5
microfarads.
Table 2.1 Wiring Recommendations: NFS-320, NFS2-640, NFS-640, NFS2-3030, NFS-3030, LCM-320, LEM-320, LIB-200A, and
FACP:
Wire Type and Limitations
Twisted, shielded pair, 40 ohms maximum per
length of Style 6 and 7 loops. 40 ohms per
branch maximum for Style 4 loops.
Untwisted, Unshielded
Note: Twisted-unshielded pair wire is not recommended for use with this panel.
Table 2.2 Wiring: AFP-100, AFP-200, AFP-300/400, LIB-200, AIM-200 (1 of 2)
16
Section 2: Wiring Requirements
LIB-200A or LIB-400 on AM2020/AFP1010 (See Table 2.2 for LIB-200.)
12,500 ft. (3,810 m)
9,500 ft. (2,895.6 m)
6,000 ft. (1,828.8 m)
3,700 ft. (1,127.76 m)
NFS-640 and LEM-320 on NFS-640
12,500 ft. (3,810 m)
9,500 ft. (2,895.6 m)
6,000 ft. (1,828.8 m)
3,700 ft. (1,127.76 m)
1,000 ft. (304.8 m)
12,500 ft. (3,810 m)
9,500 ft. (2,895.6 m)
6,000 ft. (1,828.8 m)
3,700 ft. (1,127.76 m)
5,000 ft. (1,524 m)
3,700 ft. (1,127.76m)
5,000 ft. (1,524 m)
3,700 ft. (1,127.76m)
Recommended
Max. Distance
10,000 ft. (3,000 m)
8,000 ft. (2,400 m)
4,875 ft. (1,450 m)
3,225 ft. (980 m)
1,000 ft. (300 m)
Recommended
Max. Distance
12 AWG/3.31 mm²
14 AWG/2.08 mm²
16 AWG/1.31 mm²
18 AWG/0.82 mm²
12 AWG (3.31 mm²)
14 AWG (2.08 mm²)
16 AWG (1.31 mm²)
18 AWG (0.82 mm²)
12 to 18 AWG (3.31 mm² to 0.82 mm²)
12 AWG (3.31 mm²)
14 AWG (2.08 mm²)
16 AWG (1.31 mm²)
18 AWG (0.82 mm²)
12 to 16 AWG (3.31 mm² to 1.31 mm²)
18 AWG (0.82 mm²)
12 to 16 AWG (3.31 mm² to 1.31 mm²)
18 AWG (0.82 mm²)
LIB-400
AFP-100
12 AWG (3.31 mm²)
14 AWG (2.08 mm²)
16 AWG (1.31 mm²)
18 AWG (0.82 mm²)
12-18 12 to 18 AWG (3.31 mm² to 0.82 mm²)
Notifier SLC Wiring Manual — P/N 51253:U5 12/20/2017
Wire Gauge
Wire Gauge
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