shore power 1 and 2 switch

[johnjem]

on my inside switch panel  i have 2 right panels for a/c   and 1 left panel for d/c   on the 2 right panels i have a rotary switch for shore power 1     shore power 1and 2  and generater,what is the differce between 1and 2  they both power up the whole bus i have 1 shore power cord 50 amp connected does shore power 1/2 mean if i have 2 30 amp cords ?? ps can a light switch if hooked up wrong creat reverse polarty so the real problem that i have  on shore power 1 i have a reverse polarty light that came on so i switch it to shore power 1/2  and it goes away ?? any ideas,thanks john    4905

[wrench]

 Not sure if you're hook wrong, but the way it's work= position#1 is shore power feed,  position #2  is generator feed.  The white wire is neutral, the black is live,  bare/green is ground. If color are reverse that will cause problem.  (Popular mistake is a reversed black & white wire on outlet)
If you got 240VAC(most likely)  you got 1= black wire(live),,  1=red wire(live),,  1=white wire(neutral),, 1= bare/green wire(ground).
On 240VAC you got 2 feed line 120VAC each feeding each side of the coach.(Called 50/50 split)
Keep the the AC & DC isolated from each other, it's a completely differant power feed.
                         wrench

[Ncbob]

John, I'm familiar with the switch you asked about...they were used quite often on boats.  My best guess is that the P/O anticipated polarity problems with some campgrounds and had one connected to proper polarity and the other connected for reverse polarity since in one position you have the 'reverse' light and the other no light.

Polarity with AC power is really a misnomer since AC power has no 'Polarity' as such...but a proper path of flow...meaning that the power comes in through the plug, through the circuit breakers and to the load. With reverse polarity it goes to the load first then back to the breakers.

You'll need to check it out though....perhaps this will help you.  Hope so....

NCbob

[justin25taylor]

I agree with Bob. I have seen them set up that way more than a couple times. Some people also think one of the legs is "stronger" and will allow them to run 2 or 3 roof airs on marginal service.




If you really want to get confused most of the entertainer coaches have 2 15KW gensets.
The switch is similar to yours. It has gen1, gen2, shore, off.

The reason for 2 generators is we run them months at a time and sometimes time doesn't allow us to service them. In that case we just switch to the other one until we can service the 1st one.
It is also nice in case one fails. A lot of the new Prevost shells are ordered without bus air (stupid I know) so if the generator dies so does the a/c. Sometimes the inverter will run one roof a/c but it really doesn't help much. (there are 5 ducted roof units going 24/7)
There is nothing in the world like 8-10 people griping because it is not 55 degrees in the bus.


HTH

Justin

[johnjem]

thanks guys on some good info i just bought a plug tester to make sure all my plugs are wires the right way <

[DrivingMissLazy]

This switch was originally designed for the marine market.

On my 40 ft. boat I had a shore cord receptacle on both starboard and port side. Depends on the marina you were in and the direction the boat was anchored. Since you are generally tied up alongside the pier that is where the shore cord outlet is and I plugged into the appropriate side of the boat so the cord would reach the outlet. Otherwise it would have to be strung across the channel to the pier on the other side.
Richard

[Busted Knuckle]

I agree with Bob. I have seen them set up that way more than a couple times. Some people also think one of the legs is "stronger" and will allow them to run 2 or 3 roof airs on marginal service.




If you really want to get confused most of the entertainer coaches have 2 15KW gensets.
The switch is similar to yours. It has gen1, gen2, shore, off.

The reason for 2 generators is we run them months at a time and sometimes time doesn't allow us to service them. In that case we just switch to the other one until we can service the 1st one.
It is also nice in case one fails. A lot of the new Prevost shells are ordered without bus air (stupid I know) so if the generator dies so does the a/c. Sometimes the inverter will run one roof a/c but it really doesn't help much. (there are 5 ducted roof units going 24/7)
There is nothing in the world like 8-10 people griping because it is not 55 degrees in the bus.


HTH

Justin

Justin try 59 folk screaming about it being 90* in the bus like I had Sunday when I had an OTR A/C failure and no bck up! FWIW   BK