Timeline for Upgrading garage fuse box to breaker box using existing 10/2 wire with ground
Current License: CC BY-SA 4.0
16 events
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| Jan 27, 2020 at 9:04 | history | edited | Harper - Reinstate Monica | CC BY-SA 4.0 |
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| Jan 27, 2020 at 9:03 | comment | added | Harper - Reinstate Monica | @ThreePhaseEel yeah, it's pretty easy. By the by, here's a comparison of those two cables crammed into 3/4 Sched 80 PVC (no way!!!) versus 29% conduit fill in 1-1/4" EMT, which is legal. Barely. It's at 29% fill (counting "treat as a circular wire"), and it's almost at the 30% limit for 2 wires. There isn't even space for a bare ground wire. (well actually there is, since a ground wire would be a third wire, raising the fill to 40%). | |
| Jan 27, 2020 at 8:57 | history | edited | Harper - Reinstate Monica | CC BY-SA 4.0 |
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| Jan 27, 2020 at 7:47 | history | edited | Harper - Reinstate Monica | CC BY-SA 4.0 |
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| Jan 27, 2020 at 7:41 | history | edited | Harper - Reinstate Monica | CC BY-SA 4.0 |
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| Jan 27, 2020 at 3:33 | comment | added | ThreePhaseEel | Also: awesome pics re: the situation with cables in conduit vs individual wires | |
| Jan 27, 2020 at 2:53 | comment | added | ThreePhaseEel | One other thing: Schedule 80 PVC (worst case for fill) won't fit a 70A feeder (as that requires an 8AWG EGC, which overfills the conduit slightly) -- that isn't an issue for Schedule 40 PVC or EMT though | |
| Jan 27, 2020 at 2:47 | comment | added | ThreePhaseEel | Ah! Good catch, thanks! | |
| Jan 27, 2020 at 2:27 | comment | added | Harper - Reinstate Monica | @ThreePhaseEel you mean wall thickness x 2 right? | |
| Jan 27, 2020 at 2:15 | comment | added | ThreePhaseEel | Try adding the "minimum average ID" to the "minimum wall thickness" on that table | |
| Jan 27, 2020 at 2:10 | comment | added | Harper - Reinstate Monica | @ThreePhaseEel Yeah, I checked that. 15/16" is 0.938", which is dead-nuts halfway between sizes, 0.100" from either one. | |
| Jan 27, 2020 at 2:00 | comment | added | ThreePhaseEel | I'm suspecting it's off-nominal (but still within spec) PVC (either S40 or S80) -- the specs I've seen for PVC conduit allow for outside diameters well under 15/16" | |
| Jan 27, 2020 at 2:00 | history | edited | Harper - Reinstate Monica | CC BY-SA 4.0 |
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| Jan 27, 2020 at 1:49 | comment | added | Harper - Reinstate Monica | @ThreePhaseEel I thought that. But then, OP reports 15/16" OD (fairly specific). I searched both plastic and RMC/IMC conduit; none had diameters anywhere near that (under 7/8" or over 1"). That's not surprising since threaded or glued pipe must have a consistent OD. EMT, which is 0.922", is almost precisely 15/16". | |
| Jan 27, 2020 at 1:44 | comment | added | ThreePhaseEel | The OP stated their conduit was plastic, not metal | |
| Jan 27, 2020 at 1:33 | history | answered | Harper - Reinstate Monica | CC BY-SA 4.0 |
