Cable â€“ with a twist | Archive Titles

Table 1 - Power distances for two twisted pairs
Voltage	Pcam (W)	Dist spec max (ft)	Dist spec max (m)
12v AC or DC	5	86	28
12v AC camera	10	43	14
Ìý	20	22	7
Ìý	30	14	5
Ìý	40	11	4
Ìý	50	9	3
24v AC	5	346	113
24v AC camera	10	173	57
Ìý	20	86	28
Ìý	30	58	19
Ìý	40	43	14
Ìý	50	35	11
28v AC	5	922	302
28v AC camera	10	461	151
Ìý	20	230	76
Ìý	30	154	50
Ìý	40	115	38
Ìý	50	92	30

Table 2 - Power distances for two twisted pairs
Voltage	Pcam (W)	Dist spec max (ft)	Dist spec max (m)
12v AC or DC	5	130	43
12v AC camera	10	65	21
Ìý	20	32	11
Ìý	30	22	7
Ìý	40	16	5
Ìý	50	13	4
24v AC	5	518	170
24v AC camera	10	259	85
Ìý	20	130	43
Ìý	30	86	28
Ìý	40	65	21
Ìý	50	52	17
28v AC	5	1382	454
28v AC camera	10	691	227
Ìý	20	346	113
Ìý	30	230	76
Ìý	40	173	57
Ìý	50	138	45

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