Timeline for Wiring 100 Amp RV/tiny house panel from two 240v 50A feeds
Current License: CC BY-SA 4.0
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| Nov 8, 2022 at 19:23 | history | edited | manassehkatz-Moving 2 Codidact | CC BY-SA 4.0 |
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| Nov 8, 2022 at 17:18 | comment | added | manassehkatz-Moving 2 Codidact | What you'll overload is the 50A feed. And even if you put in a 50A breaker, you wouldn't be able to predict whether your breaker or upstream breaker would trip. Leave it at 100A. | |
| Nov 8, 2022 at 17:16 | comment | added | manassehkatz-Moving 2 Codidact | Larger breaker is fine. The 50A receptacle has its own breaker which protects the wire to your panel. The exception is if this is a true main panel, first box after the meter - then your breaker has to match service feed. | |
| Nov 8, 2022 at 17:12 | comment | added | Steve Rose | This is a phenomenal response. Follow-up question - should I be temporarily installing a 50A main breaker to use off a single 50A feed until I permanently plant the home? How would this interact with a situation where my 2400W panel is set up to supply power to 1800W worth of connections (I don't have my designs in front of me, but as a rough example), but we're reducing to 1200W cap? If I (accidentally) overload the main without overloading the other breakers, is that an acceptable design, or would other considerations be required? If I didn't say it already, thank you for the superb answer. | |
| Nov 8, 2022 at 15:57 | comment | added | KMJ | All of this is true. The key phrase for search to learn more about doing this is 'watt diet'. The only safe way to get 100A from two 50A circuits is to have two completely independent electrical systems. It's completely unnecessary. With efficient appliances and decent planning you will never feel constrained by 50A. | |
| Nov 8, 2022 at 15:45 | history | answered | manassehkatz-Moving 2 Codidact | CC BY-SA 4.0 |