Wire Cost: Difference between revisions
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*Terminations at panels must be rated at 60C - [https://diy.stackexchange.com/questions/212961/sub-panel-feeder-circuit-wire-sizing#:~:text=(1)%20Conductors%20rated%2060%C2%B0,C%20(140%C2%B0F).] - thus you must specify wire for 60C. For example, if you want 100A, oversize 100A 90C wire to something larger at whose 60C rating you get the required ampacity. | *Terminations at panels must be rated at 60C - [https://diy.stackexchange.com/questions/212961/sub-panel-feeder-circuit-wire-sizing#:~:text=(1)%20Conductors%20rated%2060%C2%B0,C%20(140%C2%B0F).] - thus you must specify wire for 60C. For example, if you want 100A, oversize 100A 90C wire to something larger at whose 60C rating you get the required ampacity. | ||
*THHN to subpanel - yes if in conduit - [https://www.reddit.com/r/electrical/comments/j0iks3/can_you_wire_thhn_direct_to_a_sub_panel/] | *THHN to subpanel - yes if in conduit - [https://www.reddit.com/r/electrical/comments/j0iks3/can_you_wire_thhn_direct_to_a_sub_panel/] | ||
*Standard practice - individual THHN through conduit or NM-B through stud holes [https://www.thespruce.com/romex-and-conduit-wiring-in-exposed-locations-1821529] | |||
=Cost= | =Cost= | ||
Revision as of 23:35, 15 May 2023
About
- NM-B house wire is specified for 60C by the NEC, but it can withstand 90C. [1]
- 2AWG is rated for 95A at 60C, 1 AWG is rated for 110 at 60C [2]
- USE-2, RHW-2 and RHH - sunlight, heat, moisture resistant [3]
- Aluminum ampacity - 1/0 aluminum does 100A at 60C. Good chart of wire types and their T resistance [4]
- Terminations at panels must be rated at 60C - [5] - thus you must specify wire for 60C. For example, if you want 100A, oversize 100A 90C wire to something larger at whose 60C rating you get the required ampacity.
- THHN to subpanel - yes if in conduit - [6]
- Standard practice - individual THHN through conduit or NM-B through stud holes [7]