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C561M-F (8/06) 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
Power Consumption
(25 VA)
20 AWG
(0.5 mm
2
)
18 AWG
(1.0 mm
2
)
16 AWG
(1.5 mm
2
)
14 AWG
(2.5 mm
2
)
12 AWG
(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)
Power Consumption
(50 VA)
20 AWG
(0.5 mm
2
)
18 AWG
(1.0 mm
2
)
16 AWG
(1.5 mm
2
)
14 AWG
(2.5 mm
2
)
12 AWG
(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)
Power Consumption
(70 VA)
20 AWG
(0.5 mm
2
)
18 AWG
(1.0 mm
2
)
16 AWG
(1.5 mm
2
)
14 AWG
(2.5 mm
2
)
12 AWG
(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)