Pelco DF5 manual Appendix, Cable Type Maximum Distance

Appendix

Table A. 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)

*Cable requirements: 75-ohm impedance

All-copper center conductor

All-copper braided shield with 95% braid coverage

Table B shows 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.)

Table B. 24 VAC Wiring Distances

				Wire Gauge
		20	18	16	14	12	10
	10	283	451	716	1142	1811	2880
		(86)	(137)	(218)	(348)	(551)	(877)
								fromdistanceMaximum loadtotransformer
consumedVATotal	20	141	225	358	571	905	1440
		(21)	(34)	(54)	(86)	(137)	(219)
		(42)	(68)	(109)	(174)	(275)	(438)
	30	94	150	238	380	603	960
		(28)	(150)	(72)	(115)	(183)	(292)
	40	70	112	179	285	452	720
	50	56	90	143	228	362	576
		(17)	(27)	(43)	(69)	(110)	(175)

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

For example, an enclosure that requires 30 VA and is installed 94 ft (28 m) from the transformer would require a minimum wire gauge of 20 AWG.

Models with heaters require 24 VAC for the heater; the heater uses 58 VA. If the camera uses 24 VAC, add the camera power to that of the heater and refer to Table B to determine the size of wire to use.

C1458M-J (9/08) 13