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
Unit of Measure

Conductor
Size
AWG
or
kcmil

N/A 250

Neutral
Wires

N/A 10

Neutral
Size
AWG

N/A 14

Neutral
Size

N/A 1/3

Sequence
Impedance
Pos/Neg
(µΩ/feet)

N/A 100.89 + j51.01

Seq
Impedance
Zero
(µΩ/feet)

N/A 358.9 + j146.17

Ampacity
LF=100%
(A)

N/A 339

Ampacity
LF=75%
(A)

N/A 391