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Wednesday, July 23, 2008

Comments

Are you saying after all the work digging the ditch too small a wire was installed?

Howard - although your information about wire sizes is correct, for 50 amp service you essentially need 2 30amp 120 volt circuits. This yields the 220 3 wire necessary for 50 amp service. Thus each of the circuits needs to be sized for 30 amp service, thus 3 8 gauge wires will be what's required.

The 220 is split in your RV into two separate 30 amp circuits for running the appliances. Ours splits the 2 circuits between front and back of the RV.

How did fishing in the Foldcat go?

Mine came today 10 boxes total. I got the 440fc so the extra seats and extra stuff we ordered took more to pack.

I can't wait to get it on the water this weekend.

Chaney,

No, the ditch we dug was 230 feet from the main electrical junction to a cabin near our RV sites. There is a junction box at that cabin and then another wire is buried between the cabin junction and our RV pedestals.

We had to replace that long run of wire to the cabin (which was too small) first which improved our service. But, if we want to complete the job and have 50 amp service, we will have to replace that last run of wire from the cabin to our sites.

It's just not worth moving our rigs and having the disruption while we are here to get the 50 amp service which would be nice, but is not really necessary.

Ken,

I'm no electrical expert, but it's my understanding that 50 amp service is actually 2 120-volt circuits (total of 240) coming in on a 4-wire line, not a 3-wire line. Thus the four prongs on a 50-amp outlet - ground, neutral, and two hot 120-volt wires.

http://www.myrv.us/electric/

As the website states, most RVs do use each 120-volt hot leg of the service separately. But it is two 50-amp circuits, not two 30-amp circuits. So there is actually 100 amps available.

Using the watts = amps X volts equation, 50-amp service delivers two hot lines capable of 6,000 watts each or a total of 12,000 watts. 30-amp service has only one hot line and delivers only 3,600 watts. So even two 30-amp lines would only deliver 7,200 watts.

So, it is my understanding that 50-amp service is NOT just two 30-amp circuits. It's actually much better than that. And, therefore, 50-amp service requires larger wires to carry its larger capacity. :)

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