PowerGuard® AL 35kV 100% TR-XLPE CN XLPE UL Type MV-105 Electrical Properties  (FLAT SPACED @ 7.5 INCHES)


NOTES

Conductor ampacities are based on the following:

• Load factor of 100% or 75%
• Earth thermal resistivity of 0.900ºC-m/W
• Ambient earth temperature of 20ºC
• Maximum conductor operating temperature of 105ºC
• Concentric neutral wires grounded at both ends (shield circulating currents flowing)
• Minimum separation of 3 m or 9.8 ft from any other underground electrical system or heat source
• Maximum load variation between phases of 10%
• Maximum 910 mm or 36 in depth of burial
• Cable arrangements:
○ Trefoil and touching
○ Flat and touching
○ Flat and spaced 190 mm or 7.5 in, center-to-center
• The ampacity values calculated may be limited by the maximum earth interface temperature due to soil moisture migration or dry out, and has not been considered here.


Updated 3/16/2022
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Unit of Measure
Items
AWG MV AL XLPE CU CN

AWG MV AL XLPE CU CN

AWG MV AL XLPE CU CN

AWG MV AL XLPE CU CN

AWG MV AL XLPE CU CN
Conductor
Size
AWG
or
kcmil 		N/A 1/0 N/A 1/0 N/A 1/0 N/A 1/0 N/A 2/0
Neutral
Wires 		N/A 12 N/A 13 N/A 10 N/A 7 N/A 15
Neutral
Size
AWG 		N/A 14 N/A 16 N/A 16 N/A 16 N/A 14
Neutral
Size 		N/A Full N/A 2/3 N/A 1/2 N/A 1/3 N/A Full
Sequence
Impedance
Pos/Neg
(µO/feet) 		N/A 249.31 + j57.34 N/A 248.6 + j58.15 N/A 248.16 + j58.22 N/A 247.72 + j58.27 N/A 193.89 + j55.69
Seq
Impedance
Zero
(µO/feet) 		N/A 473.3 + j116.99 N/A 538.21 + j188.58 N/A 574.08 + j257.24 N/A 597.79 + j368.65 N/A 383.53 + j89.97
Ampacity
LF=100%
(A) 		N/A 204 N/A 204 N/A 204 N/A 204 N/A 235
Ampacity
LF=75%
(A) 		N/A 233 N/A 233 N/A 233 N/A 233 N/A 270