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rl_sd

Wiring issue on the new house

19 posts in this topic

I am getting everything finalized on the new wheel house in hope that we are able to get it out sometime in January.... I ended up picking up a 32" LED TV that I plan on running using an inverter when not hooked up to the generator. The TV draws 30 watts... so right around 3 amps if you figure in 20% inverter inefficiency. I have tested it w/ my multimeter and it does pull ~3 amps when using the inverter. I have wired in a specific 12v outlet for the TV and used 14 gauge wire. The wire run is about 26'. The problem that I am seeing is that when running the tv through the inverter, my line loss is about 2 volts dropping it down to 10.5 v thus kicking out the inverter..... Obviously hind sight I should have ran either 12 or 10 gauge wire.... but shouldn't the 14 gauge still be able to handle a 3 amp draw across 27 feet? The totally craptastic part is that the house is sprayfoamed... any fixes to the problem are going to have to be run inside...

Edited by rl_sd

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What kind of wire did you use?  Not all wire is created the same or is the same quality.  Speaker wire is notorious for the notion of "you get what you pay for". 

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What kind of wire did you use?  Not all wire is created the same or is the same quality.  Speaker wire is notorious for the notion of "you get what you pay for". 

This is a true 2-stranded 14 gauge from menards, not speaker wire.

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An inverter take 12 volt DC and converts it to 120 volt AC.  How is this running a specific 12 volt outlet.  It should be a 120 volt AC outlet.  If the TV runs off 12 volts DC you would not need an inverter.

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12 volt outlet running an inverter which runs a TV. 

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Can you move the inverter to were the battery is? Then you could run 120 Volts AC and convert that special outlet to a standard 2 prong ac outlet. 

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that size wire is way too small to be running the inverter, the inverter should be as close as possible to the battery and then the 110 volt line run to the tv, to run an inverter power cable 26 feet i would use a number 2 wire from the batteries

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that size wire is way too small to be running the inverter, the inverter should be as close as possible to the battery and then the 110 volt line run to the tv, to run an inverter power cable 26 feet i would use a number 2 wire from the batteries

it is only a 130 watt inverter used to power a 30 w TV, not the whole house. 

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 26' of 14 gauge wire is too small to run a 12 volt DC inverter.

As said in a few replies,  put the inverter closer to the battery. 

Use the 14 gauge wire you have run now and put 120 volt AC receptacle at that TV.

Both the 12 and 120 volt should have fuses or circuit breaker. One at the 12 volt + terminal at the battery and a 15 amp breaker between the load and inverter. That should be as close to the inverter as possible.

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 26' of 14 gauge wire is too small to run a 12 volt DC inverter.

As said in a few replies,  put the inverter closer to the battery. 

Use the 14 gauge wire you have run now and put 120 volt AC receptacle at that TV.

Both the 12 and 120 volt should have fuses or circuit breaker. One at the 12 volt + terminal at the battery and a 15 amp breaker between the load and inverter. That should be as close to the inverter as possible.

While I respect your post, I think that there is still a larger issue. Inverter aside, 3 amps is barely enough to charge a cell phone these days and 14 gauge should  not have an issue with 3 amps across 26' according to all the DC charts that I have looked at

 

Edited by rl_sd

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While I respect your post, I think that there is still a larger issue. Inverter aside, 3 amps is barely enough to charge a cell phone these days and 14 gauge should  not have an issue with 3 amps across 26' according to all the DC charts that I have looked at

 

No matter what the charts say, in my experience inverters are very voltage sensitive. Any time you have more than 4' between the battery & inverter there is at least intermittent issues with the voltage. And that is with 12 gauge romex. 

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Dude.....

Listen to these guys.

Your wire is too small, and you want the inverter close to the battery. Plain and simple.

And amps aren't created equal.

There is a huge difference when comparing a 3 amp cell charger at 5 volts and something pulling 3 amps at 120 volts. (15 watts compared to 360 watts)

 

 

 

Edited by B-man715

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 So I'm picturing a 130 watt inverter that plugs into your cigarette lighter.

I'll assume you tried this in your automobile and it worked.

Where else are you getting 2 volt drop from?

What kind of connections are you using?

 

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Yes... 130 watt cigarette lighter. I have ran the TV on it and tested the 12 volt draw at the battery... It pulls 3 amps. The circuit goes from the battery to the converter/charger, gets passed through a 10 amp fused DC circuit within the converter and then heads to the 12 volt cigarette outlet. I have taken a break from the problem for a week to do some brainstorming, but plan on digging into it this weekend. First plan is to bypass the Converter to ensure that I don't have some sort of weird issue there. I am also going to double check the connection on the back of the 12 volt outlet. If all else fails, I am going to run a 10 gauge pair from the back to the front along the base board. This should cut about 8' from the run, which is why I am going w/ 10 gauge instead of 8.

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Have you tried a different inverter?  I do exactly what you're looking to do in my ice castle when I don't have the generator going.  No clue what gauge wire they use, but your inverter could be the issue if it's not very efficient.  Might be worth trying that before running new wires.

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not being a smart a here, just run the generator. 

 

yeah.... I know. But it is nice to get a few hours in without the light humming...

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Have you tried a different inverter?  I do exactly what you're looking to do in my ice castle when I don't have the generator going.  No clue what gauge wire they use, but your inverter could be the issue if it's not very efficient.  Might be worth trying that before running new wires.

The inverter is quoted at 87% efficient.  I messed with it this weekend, but I think that we have came up with a work around that won't require trying to thread a new wire. .... The spray foam is going to make that nearly impossible without pulling siding loose.

What we are planning on doing is wiring a male house hold plug onto the end of the 120v AC circuit wired within the house. We will also wire a 120 AC recepticle box out of the conveter charger. What it allows us to do is mount the inverter right next to the battery and switch between using shoreline (generator) or the inverter to power the 120 AC house circuit. Something like this....

Invert Setup.jpg

Edited by rl_sd
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At those age old times when I was staying at my house in Ontario, I had to face such a situation where in I could not even rectify what the issue was actually in the electrical area and that is when one of my cousin told me about a professional in town who were specialists in electrical wiring problems and things as such. I had called them up regarding the issue and they had come to my house to check the solutions that can be provided and did it all well. Till date I have found nil issues in it again and hope they can help u too :) Contact them through http://www.theshockdoctors.ca/

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