Pelco BB5L operation manual Wire Gauge

EXAMPLE: A dome that requires 90 vA and is installed 31 feet (9 m) from the transformer would require a minimum wire gauge of 20 AWG.

NOTE: Distances are calculated in feet; values in parentheses are meters.

Table B. 24 VAC Wiring Distances

The following are the recommended maximum distances for 24 VAC with a 10- percent voltage drop. (Ten percent is generally the maximum allowable voltage drop for AC-powered devices.)

Wire Gauge

		20	18	16	14	12	10
	10	283	451	716	1142	1811	2880
		(86)	(137)	(218)	(348)	(551)	(877)
	20	141	225	358	571	905	1440
		(42)	(68)	(109)	(174)	(275)	(438)
	25	113	180	286	457	724	1152
		(34)	(55)	(87)	(139)	(220)	(351)
	30	94	150	238	380	603	960
		(28)	(45)	(72)	(115)	(183)	(292)
	40	70	112	179	285	452	720
		(21)	(34)	(54)	(86)	(137)	(219)
	50	56	90	143	228	362	576
		(17)	(27)	(43)	(69)	(110)	(175)
								loadto
	60	47	75	119	190	301	480
		(14)	(22)	(36)	(57)	(91)	(146)
	70	40	64	102	163	258	411
		(12)	(19)	(31)	(49)	(78)	(125)	fromdistancetransformer
consumedvATotal
	120	23	37	59	95	150	240
	80	35	56	89	142	226	360
		(10)	(17)	(27)	(43)	(68)	(109)
	90	31	50	79	126	201	320
		(9)	(15)	(24)	(38)	(61)	(97)
	100	28	45	71	114	181	288
		(8)	(13)	(21)	(34)	(55)	(87)
	110	25	41	65	103	164	261
		(7)	(12)	(19)	(31)	(49)	(79)
		(7)	(11)	(17)	(28)	(45)	(73)	Maximum
	140	20	32	51	81	129	205
	130	21	34	55	87	139	221
		(6)	(10)	(16)	(26)	(42)	(67)
		(6)	(9)	(15)	(24)	(39)	(62)
	150	18	30	47	76	120	192
		(5)	(9)	(14)	(23)	(36)	(58)
	160	17	28	44	71	113	180
		(5)	(8)	(13)	(21)	(34)	(54)
	170	16	26	42	67	106	169
		(4)	(7)	(12)	(20)	(32)	(51)
	180	15	25	39	63	100	160
		(4)	(7)	(11)	(19)	(30)	(48)
	190	14	23	37	60	95	151
		(4)	(7)	(11)	(18)	(28)	(46)
	200	14	22	35	57	90	144
		(4)	(6)	(10)	(17)	(27)	(43)

Pelco Manual C1488M-A (9/98) 11