Installation Instructions

Site Evaluation

1.4.12 Determine the Length of Power Cables

When Using Triton Network Systems Outdoor Power Cables

Table 1-1 and Table 1-2 show the maximum lengths of indoor power cable lengths when used

with representative Triton Network Systems outdoor power cables.

Table 1-1: Maximum Indoor Power Cable Length

with One Pair of Conductors

Table 1-2: Maximum Indoor Power Cable Length

with Two Pairs of Conductors

When Using Customer or Third Party Outdoor Power Cables

The maximum length of an IFU power cable, if using a single-pair 12-AWG cable from the

power plant to the IFU, may be determined by the following calculation and information in

Table 1-3 and Table 1-4.

The resistance in the power cable(s) from the power supply to the IFU should be no greater than

2.6 Ω (ohms). Assuming the use of an indoor and outdoor cable, the formula for the maximum

allowable length of the indoor cable is:

where:

is the distance of the indoor cable run, in feet

is the resistance per foot of the cable used, in ohms for each standard length (see Table 1-3)

Indoor Cable Gauge

Outdoor Cable Length (Feet and Meters)

65 Feet (20 Meters) 133 feet (40 Meters) 333 Feet (100 Meters)

10 AWG 1125.6 (343.1) 1090.0 (332.2) 992.1 (302.4)

12 AWG 557.2 (169.8) 539.6 (164.4) 491.1 (149.7)

14 AWG 446.7 (136.2) 432.5 (131.8) 393. (120.0)7

Indoor Cable Gauge

Outdoor Cable Length (Feet and Meters)

65 Feet (20 Meters) 133 feet (40 Meters) 333 Feet (100 Meters)

10 AWG 2251.2 (682.2) 2180.0 (664.5) 1984.2 (604.8)

12 AWG 1114.4 (339.7) 1079.2 (328.9) 982.3 (299.4)

14 AWG 893.3 (272.3) 865.1 (263.7) 787.4 (240.0)

NOTE: 1 ft = 0.305 m

2.6( R

)

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2 R×′

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