Tyco SafeLINC 4100U Manual Do Utilizador

 

 

7-7

 
 

Table 7-2 lists the maximum distances from the NAC terminal block to the last appliance 
in a Class B configuration, depending on wire gauge and current. Use Table 7-2 to 
calculate wire distances for your application if you are using Class B wiring.  
 

w/ 14 AWG 

0.25 A 

840 ft. (256 m) 

1,335 ft. (407 m)  2,126 ft. (648 m)  3,382 ft. (1,031 m) 

12 Ohms 

0.50 A 

420 ft. (128 m) 

667 ft. (203 m) 

1,063 ft. (324 m) 

1,691 ft. (515 m) 

6 Ohms 

0.75 A 

280 ft. (85 m) 

445 ft. (136 m) 

709 ft. (216 m) 

1,127 ft. (344 m) 

4 Ohms 

1 A 

210 ft. (64 m) 

334 ft. (102 m) 

532 ft. (162 m) 

845 ft. (258 m) 

3 Ohms 

1.25 A 

168 ft. (51 m) 

267 ft. (81 m) 

425 ft. (130 m) 

676 ft. (206 m) 

2.4 Ohms 

1.50 A 

140 ft. (43 m) 

222 ft. (68 m) 

354 ft. (108 m) 

564 ft. (172 m) 

2 Ohms 

1.75 A 

120 ft. (37 m) 

191 ft. (58 m) 

304 ft. (93 m) 

483 ft. (147 m) 

1.71 Ohms 

2 A 

105 ft. (32 m) 

167 ft. (51 m) 

266 ft. (81 m) 

423 ft. (129 m) 

1.5 Ohms 

2.25 A 

93 ft. (28 m) 

148 ft. (45 m) 

236 ft. (72 m) 

376 ft. (115 m) 

1.33 Ohms 

2.50 A 

84 ft. (26 m) 

133 ft. (41 m) 

213 ft. (65 m) 

338 ft. (103 m) 

1.2 Ohms 

2.75 A 

76 ft. (23 m) 

121 ft. (37 m) 

193 ft. (59 m) 

307 ft. (94 m) 

1.09 Ohms 

3 A 

70 ft. (21 m) 

111 ft. (34 m) 

177 ft. (54 m) 

282 ft. (86 m) 

1 Ohm 

 
Notes: 
•  Max Distance = distance from SPS or RPS to last appliance. 
•  This table is calculated at 49 degrees Centigrade (120 degrees 

Fahrenheit). If you are installing in locations that could be exposed to 
higher temperatures, refer to NEC Table 7 and 8 in NFPA code, or 
applicable local standard. 

•  Distances are based on a 3 V drop, and take into account the worst-case 

panel output voltage.  These distances are worst case to allow for one 
single load at the furthest point. 

•  If circuit integrity wire is used instead of housing cable in a fire rated 

enclosure, reduce wiring distances by 38 feet (12 m) for every 10 feet (3 
m) of potential exposure. 

•  For other wire gauges (e.g. 4 mm

2

) multiply the distance specified for the 

nearest wire size by the ratio of the wire area, e.g. for 3A on 4 mm

2 

look 

up 3A on 12AWG (3.3 mm

2

) and multiply the resulting 86m x 4.0/3.3 = 

104m.