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Old 05-01-2015, 12:44 AM   #1
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Extra electrical pigtail in power compartment?

Probably another totally dumb question (I seem to be trying for a new personal record lately!) but here goes. Talking here about a 2015 Legacy SR340 360RB. In the back of the power compartment, next to the auto transfer switch, there is a short male pigtail that appears to be a standard 20A cord. Can anyone tell me it's function? Is it possibly to connect a separate 20A power supply if you only have 30A service available? Thanks.
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Old 05-01-2015, 06:50 AM   #2
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Is your unit diesel powered? If so, could be a block heater.

Good luck,
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Old 05-01-2015, 07:23 AM   #3
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Originally Posted by conceptumator View Post
Probably another totally dumb question (I seem to be trying for a new personal record lately!) but here goes. Talking here about a 2015 Legacy SR340 360RB. In the back of the power compartment, next to the auto transfer switch, there is a short male pigtail that appears to be a standard 20A cord. Can anyone tell me it's function? Is it possibly to connect a separate 20A power supply if you only have 30A service available? Thanks.
15 amp or 20amp ? There is a BIG difference.


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Old 05-01-2015, 07:36 AM   #4
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Perhaps a photo would help Legacy owners (if it is a part of the coach) or others identify the thing and it's purpose.


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Old 05-01-2015, 08:03 AM   #5
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Originally Posted by dmdrj5 View Post
Is your unit diesel powered? If so, could be a block heater.

Good luck,
Don
This is correct, engine block heater, works great in the winter!
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Old 05-01-2015, 08:50 AM   #6
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I think you hit it on the head, dmdrj5! I'm new to the diesel world and hadn't thought about that. Thank you for solving my latest mystery and educating me a bit more! Thanks to everyone else, too, for your input. Have a wonderful weekend, All!
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Old 05-02-2015, 12:42 PM   #7
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Originally Posted by conceptumator View Post
Probably another totally dumb question (I seem to be trying for a new personal record lately!) but here goes. Talking here about a 2015 Legacy SR340 360RB. In the back of the power compartment, next to the auto transfer switch, there is a short male pigtail that appears to be a standard 20A cord. Can anyone tell me it's function? Is it possibly to connect a separate 20A power supply if you only have 30A service available? Thanks.
Wow, I thought I had identified every circuit in our rig, but sure enough there is a pigtail for the block heater there. Since there is a breaker marked "block heater" I had just turned it off (like I would ever use it in southern CA). I see there is a 15 amp outlet also in that bay that I am sure is for the heater. Thanks much for bringing up the subject, I can see me getting into cold weather and getting my feathers in an uproar because the heater doesn't work.
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Old 05-06-2015, 12:12 AM   #8
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So, the other day I was using my 2 air conditioning units and I was powering them off of the generator. Everything was going fine for about an hour and then I heard a click noise come from the breaker panel under the bed. I noticed that the block heater breaker was popped. I then went to reset the breaker and boom again but this time it shut everything down for a second. I had assumed at that time that the block heater must be tied into the batteries somehow but now after reading this and seeing that plug in my power bay I'm wondering why this happened to me. It was not plugged in, so I have no idea why it would have popped the breaker.
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Old 05-06-2015, 12:36 AM   #9
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So, the other day I was using my 2 air conditioning units and I was powering them off of the generator. Everything was going fine for about an hour and then I heard a click noise come from the breaker panel under the bed. I noticed that the block heater breaker was popped. I then went to reset the breaker and boom again but this time it shut everything down for a second. I had assumed at that time that the block heater must be tied into the batteries somehow but now after reading this and seeing that plug in my power bay I'm wondering why this happened to me. It was not plugged in, so I have no idea why it would have popped the breaker.
Hmmm, me either. Makes no sense if the block heater was not plugged in. I have tested that plug in the bay and it seems that it is the only thing on the block heater breaker. No clue at this point.
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Old 05-06-2015, 07:32 AM   #10
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Originally Posted by Mons02035 View Post
So, the other day I was using my 2 air conditioning units and I was powering them off of the generator. Everything was going fine for about an hour and then I heard a click noise come from the breaker panel under the bed. I noticed that the block heater breaker was popped. I then went to reset the breaker and boom again but this time it shut everything down for a second. I had assumed at that time that the block heater must be tied into the batteries somehow but now after reading this and seeing that plug in my power bay I'm wondering why this happened to me. It was not plugged in, so I have no idea why it would have popped the breaker.
Can you check the voltage being delivered by the generator while both air conditioners are running? If the 2nd AC is on the same circuit as the block heater outlet (and that is all that is there - there may be other things not working with that breaker popped), you may be pulling too many amps on that circuit if the voltage is low and the AC compressor/fan kicks on.
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