|« Question – 200 Amp Main Circuit Breaker Tripping – Part 2||Home Wiring Electrical Boxes »|
Question – 200 Amp Main Circuit Breaker Tripping – Part 1
© By: Dave Rongey - Summary: |
My 200 amp main electrical circuit breaker trips. Should I replace it?
I have a 200A main panel which is fully utilized. I recently put in an inground swimming pool and a finished basement – so I put in a main lug 20 circuit 100A panel downstream to service my pool and basement.
Everything went all right until recently my 200A main breaker occasionally trips. This happened tonight when both central air units were on, (one 4-ton unit one 2-ton unit), my pool pump (15A), and my washing machine.
I went to the main panel and measured 19A off one leg and 45 off the other. I may try load balancing and move the 4-ton unit to the leg drawing 19A – but I can’t understand why this would trip a 200A main???
So how can you solve this? One option is to have a Time Delay Relay installed on one of the A/C units as to prevent both units from starting at the same time. The relay can be installed on the thermostat control voltage side of the circuit.
You mentioned that you may try to balance the load of the A/C units, however they are most likely 240 Volts and should themselves be balanced. You can balance the panel loads by repositioning the higher 120 Volt loads onto the low reading busses.
Learn How to Wire it Right with my
Complete Guide to Home Electrical Wiring
Perfect for Homeowners, Students,
Handyman, Handywomen, and Electricians
Wiring GFCI Outlets
Wiring Home Electrical Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
Troubleshooting and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
Electrical Codes for Home Electrical Wiring
....and much more.
» Click here to learn more about Home Electrical Wiring «
Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all projects.