Pelco EH3512, EH3515 Table B. 24 VAC Wiring Distances, Wire Gauge, Pelco Manual C478M-L11/03

Table A. Enclosure Accessory Wiring Distances (Continued)

Model Number	Input Voltage	Accessories	Power Consumption	Cable Size	Cable Distance
EH3515-2	24 VAC	Heater	25 watts	20 AWG	128 ft	(39 m)
	at 60 Hz	Defroster		18 AWG	204 ft	(62 m)
		Blower		16 AWG	323 ft	(98 m)
				14 AWG	516 ft	(157 m)
EH3515-3	230 VAC	Heater	32 watts	20 AWG	21 ft	(6 m)
	at 50 Hz	Defroster		18 AWG	34 ft	(10 m)
		Blower*		16 AWG	55 ft	(16 m)
				14 AWG	88 ft	(26 m)
EH3515-1HD	120 VAC	Heater	23 watts	20 AWG	21 ft	(6 m)
	at 60 Hz	Defroster		18 AWG	66 ft	(20 m)
				16 AWG	54 ft	(16 m)
				14 AWG	87 ft	(26 m)
EH3515-2HD	24 VAC	Heater	23 watts	20 AWG	108 ft	(32 m)
	at 60 Hz	Defroster		18 AWG	172 ft	(52 m)
				16 AWG	274 ft	(83 m)
				14 AWG	437 ft	(133 m)
EH3515-3HD	230 VAC	Heater	23 watts	20 AWG	11 ft	(3 m)
	at 50 Hz	Defroster		18 AWG	18 ft	(5 m)
				16 AWG	28 ft	(8 m)
				14 AWG	45 ft	(13 m)

*Blower and resistor are 4.5 watts each for a total circuit power of 9 watts.

Table B. 24 VAC Wiring Distances

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

Wire Gauge

		20 AWG	18 AWG	16 AWG	14 AWG	12 AWG	10 AWG
Total VA		(0.5mm2)	(1.0mm2)	(1.5mm2)	(2.5mm2)	(4.0mm2)	(6.0mm2)
	10	283	451	716	1142	1811	2880
		(86)	(137)	(218)	(348)	(551)	(877)	load
	20	141	225	358	571	905	1440
		(42)	(68)	(109)	(174)	(275)	(438)	to
	30	94	150	238	380	603	960
consumed								transformer
	50	56	90	143	228	362	576
		(28)	(45)	(72)	(115)	(183)	(292)
	40	70	112	179	285	452	720
		(21)	(34)	(54)	(86)	(137)	(219)
TotalVA		(17)	(27)	(43)	(69)	(110)	(175)	distancefrom
	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)
	80	35	56	89	142	226	360	Maximum
		(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)

EXAMPLE: An enclosure that requires 80 vA and is installed 35 feet (10 m) from the transformer would require a minimum wire gauge of 20 AWG.

NOTE: Distances are calculated in feet; values in parenthe- ses are meters.

Table C. Video Coaxial Cable Wiring Distances

Cable Type*	Maximum Distance
RG59/U	750 ft (229 m)
RG6/U	1,000 ft (305 m)
RG11/U	1,500 ft (457 m)

*Minimum cable requirements: 75 ohms impedance All-copper center conductor

All-copper braided shield with 95% braid coverage

6 Pelco Manual C478M-L (11/03)