Forum Discussion
garry1p
Feb 12, 2014Explorer
It is apparent a few on here do not understand split phase and 60cps.
Keeday and pianotuner have it right.
Voltage at the pedestal L1 left post 120V to neutral, L2 right post 120V to neutral L1 to L2 is 220V
In the RV (or house) when you have a balanced load (L1 and L2 equal loads) say 10 amps on "each" 120V legs the neutral wire carries "NO" current and the load is balanced.
When one leg (L1) pulls 15 amps and the other (L2) pulls 10 you will have 5 amps carried on the neutral.
When you have a device like a 220V oven the oven will work with NO neutral connected but the clock and timer need the neutral so one side of the clock will be tied to one side (L1 OR L2) and neutral will go to the other side of the clock. The clock is now at 120V the oven @ 220V and the neutral will carry the clocks current but NOT the oven heater element current that is a balanced load.
Split phase;
When L1 is at 120V L2 is at 0V, when L2 is at 120V L1 is at 0V.
This changes on each leg 120V to 0 60 times per second. ie 120V @ 60cps.
To check a pedestal measure the voltage as Wolfe10 suggested.
For the OP when you install a new load center DO NOT connect ground and neutral to the same bus. They should only be connected at the source (CG distribution center).
Keeday and pianotuner have it right.
Voltage at the pedestal L1 left post 120V to neutral, L2 right post 120V to neutral L1 to L2 is 220V
In the RV (or house) when you have a balanced load (L1 and L2 equal loads) say 10 amps on "each" 120V legs the neutral wire carries "NO" current and the load is balanced.
When one leg (L1) pulls 15 amps and the other (L2) pulls 10 you will have 5 amps carried on the neutral.
When you have a device like a 220V oven the oven will work with NO neutral connected but the clock and timer need the neutral so one side of the clock will be tied to one side (L1 OR L2) and neutral will go to the other side of the clock. The clock is now at 120V the oven @ 220V and the neutral will carry the clocks current but NOT the oven heater element current that is a balanced load.
Split phase;
When L1 is at 120V L2 is at 0V, when L2 is at 120V L1 is at 0V.
This changes on each leg 120V to 0 60 times per second. ie 120V @ 60cps.
To check a pedestal measure the voltage as Wolfe10 suggested.
For the OP when you install a new load center DO NOT connect ground and neutral to the same bus. They should only be connected at the source (CG distribution center).
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