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Topic: Microwave dead on shore.  (Read 632 times) previous topic - next topic

Microwave dead on shore.

2006 Nimbus. I can run my microwave on generator power but not shore power.  This happened one time before but I suspected one of the legs on shore power was bad.  Any ideas? 

Re: Microwave dead on shore.

Reply #1 –
Anything else not working on shore power? Need to tske a meter and start checking from the shore pole on down the line to find where you are loosing it

Re: Microwave dead on shore.

Reply #2 –
It's strange that it works on generator power but not shore.

Re: Microwave dead on shore.

Reply #3 –
Bad leg on your shore power cord or not getting good contact on one leg in the transfer switch. I'd start at the transfer switch with a multimeter and work my way back to the pedestal

Re: Microwave dead on shore.

Reply #4 –
Definitely going to do this tomorrow morning. I know it's got to be something simple. Just need to find it. @Elliott there is a loose wire or connection somewhere.

Re: Microwave dead on shore.

Reply #5 –
Quote from: Elliott –
Bad leg on your shore power cord or not getting good contact on one leg in the transfer switch. I'd start at the transfer switch with a multimeter and work my way back to the pedestal

I would start at the pedestal , problem might not be in your coach. Reason working on generator  is the generator is supplying power on both legs. The leg that is supplying power from shore power to the microwave is not getting to the microwave

Let's vote on where problem is
Pedestal
Power cord
Cord reel (If coach has this)
twist Receptacle  or plug  at coach (if coach has this)
Transfer switch on shore power side.

My vote is pedestal

Re: Microwave dead on shore.

Reply #6 –
Xfer switch

Re: Microwave dead on shore.

Reply #7 –
Jack I really think it's going to be the reel. It's happened twice now and worked perfectly several times in between. Tomorrow I'm going to try and locate where the reel connects to the mail panel and check for loose connections. Also the ground fault in the bathroom is dead.  Actually several plugs on the starboard side are out.

Re: Microwave dead on shore.

Reply #8 –
Pedestal
Power cord plug
Cord reel contacts
In that order

Re: Microwave dead on shore.

Reply #9 –
Quote from: EddieNel –
Jack I really think it's going to be the reel. It's happened twice now and worked perfectly several times in between. Tomorrow I'm going to try and locate where the reel connects to the mail panel and check for loose connections. Also the ground fault in the bathroom is dead.  Actually several plugs on the starboard side are out.

Can I change my vote since I was not paying full attention?  I will agree with cord reel.  Odds of two different power poles losing the same leg is way up there.  The one thing I like about my IH is the power cord is hard wired into the coach, no bushing to ever have to mess with.  The system pulls in or out the power cord and coils it up. After the IH, FOT switched back to a regular cord reel. I am guessing that the IH cord "reel" is too expensive and when with the cheaper cord reels.

Re: Microwave dead on shore.

Reply #10 –
Lol Jack!!! Pedestal is good. Just checked the wires on the real and they are tight. Next I've got to remove the reel and see how it works or what's not connected.  I'm assuming it's rings that make contact as it spins?

Re: Microwave dead on shore.

Reply #11 –
As Elliott said check at the transfer switch and see if both legs have power there, as it is easy to
do.

Re: Microwave dead on shore.

Reply #12 –
Ok the surge guard is good. 124 volts on both legs.

Re: Microwave dead on shore.

Reply #13 –
Is the surge guard ahead of the transfer switch? if so it will be the problem.

Re: Microwave dead on shore.

Reply #14 –
I thought the surge guard was the transfer switch

Re: Microwave dead on shore.

Reply #15 –
I have 120 volts to the first breaker box and only 60 to the second.

Re: Microwave dead on shore.

Reply #16 –
Is this the transfer switch?

Re: Microwave dead on shore.

Reply #17 –
Quote from: craneman –
Is the surge guard ahead of the transfer switch? if so it will be the problem.

The second photo appears to be a transfer switch, so likely a SurgeGuard-branded transfer switch.

Re: Microwave dead on shore.

Reply #18 –
Quote from: EddieNel –
I have 120 volts to the first breaker box and only 60 to the second.
You probably found your problem. Try swapping the breaker that feeds the subpanel with a known good one if you can.

My guess is just a bad connection somewhere between the two boxes though

Re: Microwave dead on shore.

Reply #19 –
Quote from: EddieNel –
I have 120 volts to the first breaker box and only 60 to the second.

Larger panel is the main - input is from main transfer switch (shown as "Switching Relay #1" in the attached schematic).

Smaller panel is inverter one.  Input is either shore power from main panel or inverter power from inverter.

60 volts AC would potentially indicate a poor connection somewhere.  Voltage is a difference/relative measurement of potential, so either connection to hot or connection to neutral could be poor.