Tyco SafeLINC 4100U Manual Do Utilizador

 

 

7-6

Table 7-1 lists the maximum distances from the NAC terminal block to the last appliance 
in a Class A configuration, depending on wire gauge and current. Use Table 7-1 to 
calculate wire distances for your application if you are using Class A wiring.  

w/ 14 AWG 

0.25 A 

420 ft. (128 m) 

667 ft. (203 

m) 

1,063 ft. (324 

m) 

1,691 ft. (515 

m) 

6 Ohms 

0.50 A 

210 ft. (64 m) 

334 ft. (102 

m) 

532 ft. (162 m)

845 ft. (258 m) 

3 Ohms 

0.75 A 

140 ft. (43 m) 

222 ft. (68 m)  354 ft. (108 m)

564 ft. (172 m) 

2 Ohms 

1 A 

105 ft. (32 m) 

167 ft. (51 m) 

266 ft. (81 m) 

423 ft. (129 m) 

1.5 Ohms 

1.25 A 

84 ft. (26 m) 

133 ft. (41 m) 

213 ft. (65 m) 

338 ft. (103 m) 

1.2 Ohms 

1.50 A 

70 ft. (21 m) 

111 ft. (34 m) 

177 ft. (54 m) 

282 ft. (86 m) 

1 Ohm 

1.75 A 

60 ft. (18 m) 

95 ft. (29 m) 

152 ft. (46 m) 

242 ft. (74 m) 

0.86 Ohm 

2 A 

53 ft. (16 m) 

83 ft. (25 m) 

133 ft. (41 m) 

211 ft. (64 m) 

0.75 Ohm 

2.25 A 

47 ft. (14 m) 

74 ft. (23 m) 

118 ft. (36 m) 

188 ft. (57 m) 

0.67 Ohm 

2.50 A 

42 ft. (13 m) 

67 ft. (20 m) 

106 ft. (32 m) 

169 ft. (51 m) 

0.60 Ohm 

2.75 A 

38 ft. (12 m) 

61 ft. (19 m) 

97 ft. (30 m) 

154 ft. (47 m) 

0.55 Ohm 

3 A 

35 ft. (11 m) 

56 ft. (17 m) 

89 ft. (27 m) 

141 ft. (43 m) 

0.50 Ohm 

 
Notes: 
•  Max Distance = distance from SPS/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 Tables 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 43m x 4.0/3.3 = 

52m.