| 1.0 |
SCOPE: |
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1.1 |
This specification covers the construction
requirements for Underground Feeder
Cable, Type UF and TWU for use in
accordance with the National Electrical
Code for operation at a potential of
600 Volts or less and at a temperature
of 75°C or less. Listed by UL or ETL or
CSA. |
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| 2.0 |
CONSTRUCTION: |
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2.1 |
Conductor:
Soft drawn bare copper meeting the requirements of ASTM
specification B-3 or B-8. |
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2.2 |
Temperature Rating:
-10°C +75°C. |
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2.3 |
Insulation:
Polyvinyl chloride, 75°C rated conforming to UL Standards 493 and
83. |
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2.4 |
Manufacturer's Identification:
Surface marked with Paige-Electric,
voltage rating, size and type, Listing file
numbers, RoHS. |
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2.5 |
Listing:
All cables shall be tested physically
and electrically in accordance with UL
Standard 493, and 83. All reels and
cartons bear Listing labels. |
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| 3.0 |
PARALLEL CONSTRUCTION: |
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3.1 |
Multiple wires, of varying sizes and colors, are bound together
with a reinforced filament tape in a helical fashion. |
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SIZE AWG |
STRANDING |
INSULATION WALL (INCHES) |
APPROX. DIAMETER (INCHES) |
CURRENT CARRY CAPACITY* |
|
14 |
SOLID |
.060 |
.190 |
15 |
| 12 |
SOLID |
0.060 |
0.205 |
20 |
| 10 |
SOLID |
0.060 |
0.225 |
30 |
| 8 |
SOLID |
0.080 |
0.285 |
40 |
| 6 |
7 |
0.080 |
0.340 |
55 |
| 4 |
7 |
0.080 |
0.390 |
70 |
| 2 |
7 |
0.080 |
0.450 |
95 |
| 1 |
19 |
0.095 |
0.520 |
110 |
| 1/0 |
19 |
0.095 |
0.560 |
125 |
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| *Current carrying capacity based on not more than
3 conductors in raceway or cable or direct burial (at room temperature
of 30°C) |
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| 4.0 |
SPLICING RECOMMENDATIONS |
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Wire splices are the weak link of any electrical
circuit. It is especially important to make
proper joints in irrigation systems because
the joints are exposed to wet and damp
environments that can cause corrosion of
the copper conductor and premature failure.
Here are Paige Electric’s recommendations:
- For direct burial, above ground, or in valve
box installations: Model DBR/Y-6 as manufactured
by the 3M Company (Paige specification
P7364D)
- For installation above ground or in valve
boxes: Models 316IR or MGC as manufactured
by the 3M Company (Paige specification
P7365D), or Silicone-filled wire nuts as manufactured
by IDEAL Industries (Paige specification
P7372D)
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