CABLE CONNECTIONS AND REQUIREMENTS
Table A. Wiring Distances
The following are the recommended maximum distances to wire the
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
MAXIMUM DISTANCE FROM TRANSFORMER TO LOAD
Spectra III Indoor (25 VA) | 20 AWG | 18 AWG | 16 AWG | 14 AWG | 12 AWG |
(0.5 mm2) | (1.0 mm2) | (1.5 mm2) | (2.5 mm2) | (4.0 mm2) | |
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 mm2) | (1.0 mm2) | (1.5 mm2) | (2.5 mm2) | (4.0 mm2) |
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) |
Esprit (50 VA) | 20 AWG | 18 AWG | 16 AWG | 14 AWG | 12 AWG |
(0.5 mm2) | (1.0 mm2) | (1.5 mm2) | (2.5 mm2) | (4.0 mm2) | |
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) |
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