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C561M-D (11/03) 7
CABLE CONNECTIONS AND REQUIREMENTS
Table A. Wiring Distances
The following are the recommended maximum distances to wire the WCS1-4 to a Spectra III or
Esprit positioning system.
To determine the correct voltage tap:
1. Pick the unit type.
2. Find the wire gauge used (22 gauge is not recommended).
3. Determine which secondary output tap (A, B, or C) is appropriate for the distance between the
dome or positioning system and the WCS1-4. Distance is in feet (meters).
MAXIMUM DISTANCE FROM TRANSFORMER TO LOAD
20 AWG 18 AWG 16 AWG 14 AWG 12 AWG
Spectra III Indoor (25 VA) (0.5 mm
2
) (1.0 mm
2
) (1.5 mm
2
) (2.5 mm
2
) (4.0 mm
2
)
Tap A (24 VAC) 113 (34) 180 (55) 287 (87) 455 (139) 725 (221)
Tap B (26 VAC) 133 (40) 212 (64) 337 (103) 536 (163) 852 (260)
Tap C (28 VAC) 155 (47) 246 (75) 392 (119) 623 (190) 990 (302)
Environmental Spectra III and 20 AWG 18 AWG 16 AWG 14 AWG 12 AWG
Esprit with IOC & IOP (70 VA) (0.5 mm
2
) (1.0 mm
2
) (1.5 mm
2
) (2.5 mm
2
) (4.0 mm
2
)
Tap A (24 VAC) 41 (12) 64 (19) 102 (31) 163 (50) 259 (79)
Tap B (26 VAC) 49 (15) 78 (24) 124 (38) 198 (60) 315 (96)
Tap C (28 VAC) 55 (17) 88 (27) 135 (41) 222 (68) 353 (107)
20 AWG 18 AWG 16 AWG 14 AWG 12 AWG
Esprit (50 VA) (0.5 mm
2
) (1.0 mm
2
) (1.5 mm
2
) (2.5 mm
2
) (4.0 mm
2
)
Tap A (24 VAC) 56 (17) 90 (27) 143 (43) 228 (69) 362 (110)
Tap B (26 VAC) 66 (20) 105 (32) 168 (51) 268 (81) 425 (129)
Tap C (28 VAC) 77 (23) 122 (37) 195 (59) 311 (94) 493 (150)