Cost for electrician to re-wire Garage 240 to support 7K
- Thread starter wdcf
- Start date
I am running 6800w off of a Dryer outlet with this.
I'm not an electrician by any means.
Lights alone that's 30amp's. I think a standard dryer outlet is 30amps. You'll need to go bigger. In theory, I guess you could run an oven circuit @ 50amps. But...what do you have for other circuits to handle air/dehum/ac/etc... stuff?
I would most likely go subpanel (I did
) 6K flower with veg, AC, air, dehum, heat, etc... just about maxes my 100amp circuit (~70amps at max).
Lights alone that's 30amp's. I think a standard dryer outlet is 30amps. You'll need to go bigger. In theory, I guess you could run an oven circuit @ 50amps. But...what do you have for other circuits to handle air/dehum/ac/etc... stuff?
I would most likely go subpanel (I did
) 6K flower with veg, AC, air, dehum, heat, etc... just about maxes my 100amp circuit (~70amps at max).
I think a Dryer handles 35 amps.
I am over 30 amps with the 6800 I have going. I have a dehuey, AC, Co2, Fans, etc running off the regular outlets.
I am over 30 amps with the 6800 I have going. I have a dehuey, AC, Co2, Fans, etc running off the regular outlets.
Go with a sub panel, that way you'll have amps to spare. Do it yourself, if you're the home owner. I have a bunch of pictures showing and explaining how I did mine, burried somewhere in my CannaBunker Begins thread. I'll go find a lazy link for you.
https://www.icmag.com/ic/showthread.php?t=209119&page=11
edit- I forgot to post costs...
Sub Panel - $150
50 Amp Breaker - $50
Romex - $50
Timers x 3 - $100
Plugs and Misc - $50 - $100
Total - about $400
https://www.icmag.com/ic/showthread.php?t=209119&page=11
edit- I forgot to post costs...
Sub Panel - $150
50 Amp Breaker - $50
Romex - $50
Timers x 3 - $100
Plugs and Misc - $50 - $100
Total - about $400
GanjaPharma
Member
most of the panels for a 30amp dryer outlet are 7200w models.
and you really dont want to load that with more than 6kw.
for the 12kw boxes i use, my guy always puts in a 50 amp breaker and unless it is wired right into the panel, the receptacle is a NEMA 14-50R instead of the normal dryer outlet.
as far as how much?
a new breaker, a plug and labor is prolly around $120
a 12kw panel with timer and start delay, between 2 and 400 depending on who builds it.
dxsoundco builds a good....if not superior product. nowirenuts builds a great, but pricey one. and powerbox makes em for around $600
and you really dont want to load that with more than 6kw.
for the 12kw boxes i use, my guy always puts in a 50 amp breaker and unless it is wired right into the panel, the receptacle is a NEMA 14-50R instead of the normal dryer outlet.
as far as how much?
a new breaker, a plug and labor is prolly around $120
a 12kw panel with timer and start delay, between 2 and 400 depending on who builds it.
dxsoundco builds a good....if not superior product. nowirenuts builds a great, but pricey one. and powerbox makes em for around $600
MPL
Member
Dryers are 30amps. I don't think you can even get 35amp breakers.
So you are running 6800+ watts on a 30amp dryer circuit?
I hope you have excellent homeowner's/renter's insurance. Pulling 28.3amps on a 30amp line is the kind of thing that gets you on the news as another burned up growhouse. That's 28.3amps just in your lights by the way... not smart.
So you are running 6800+ watts on a 30amp dryer circuit?
I hope you have excellent homeowner's/renter's insurance. Pulling 28.3amps on a 30amp line is the kind of thing that gets you on the news as another burned up growhouse. That's 28.3amps just in your lights by the way... not smart.
MPL
Member
That labor assumes he doesn't have to actually run your wire and add outlets for you. If he does, consider the cost of drywall patching, paint and other supplies in addition to labor. Having done similar jobs before (running A/V wiring) I'd expect another $200 on the bill. Also, depending on how you run the wire, you may require conduit or other items.
Just stuff to keep in mind.
Just stuff to keep in mind.
i only pull 3kw out of my 30amp although you could push 5kw but i wouldnt recomend it...7k off 30amp is just retarded...do some research first..
the parts alone are only like 500 bucks like cannabunker said...but after labor id guess a standard sparky would charge 1500 for everything...
the parts alone are only like 500 bucks like cannabunker said...but after labor id guess a standard sparky would charge 1500 for everything...
beanja
Member
A regular dryer outlet is only rated for 30 amps, just check wire size and if it is #10 guage wire then it is only rated for 30 amps, a dryer circuit @ 30 amps gives u watts = v x a, 30 x 240= 7200 watts, code only wants circuit loaded to 80 % so 7200 x .8 = 5760. You can try 7k of lighting but guarantee if u r using magnetic ballasts the power surge @ startup is gonna trip breaker .
Bobby u are still under 7200 watts, u are close to overloading circuit , ur breaker is probably getting a little warm, thats the only reason code wants 80 % of breaker amperage.
Bobby u are still under 7200 watts, u are close to overloading circuit , ur breaker is probably getting a little warm, thats the only reason code wants 80 % of breaker amperage.
I
Iron_Lion
yup agrre with others.
Last edited:
420shooter
Member
You could just get a controller from here.
http://www.dxhydro.com/
Lots of options and pretty decent prices IMO.
http://www.dxhydro.com/
Lots of options and pretty decent prices IMO.
the_extremist
Member
Licensed electrician here. 
It really depends on whether your dryer outlet is wired with #10 or #8 wire. #10 is good for 30 amps, #8 is good for 40. Figure this out and it will tell your sparky how to approach it.
Remember that just because your existing 30 amp circuit is rated for 7200W, it doesn't mean you can load it up to capacity. Nearly everything in your grow will fall under the category of "continuous loads," including your lighting. NEC requires that your connected continuous load not exceed 80% of your overcurrent rating (30 amps). That would be 24 amps or 5760W max, no exceptions. This is a sacred part of the code. So if your dryer outlet is #10 wire, you'll need to have your sparky run a new circuit or maybe even a sub-panel if you're gonna go through that much trouble. Might as well do it proper. If it's #8 wire, you're good to go. #8 on a 40amp breaker is good for 7680W max connected continuous load.
If your service panel is in the garage, this is a no-brainer. Few hundo at the most. If he's gotta run a line from the basement or across the building somewhere, you could run upwards of 500 to a grand, depending on how far and how much wire is required and how crazy you wanna get with your setup. Material costs will also depend on whether you need receptacles and timers installed or if you're just going to plug in one of those control boards like someone posted above. Materials for doing a subpanel with receptacles and a good industrial timer could cost a couple hundred as well.
Good luck, and don't forget to tip the guy too. We take Benji's and/or buds.
It really depends on whether your dryer outlet is wired with #10 or #8 wire. #10 is good for 30 amps, #8 is good for 40. Figure this out and it will tell your sparky how to approach it.
Remember that just because your existing 30 amp circuit is rated for 7200W, it doesn't mean you can load it up to capacity. Nearly everything in your grow will fall under the category of "continuous loads," including your lighting. NEC requires that your connected continuous load not exceed 80% of your overcurrent rating (30 amps). That would be 24 amps or 5760W max, no exceptions. This is a sacred part of the code. So if your dryer outlet is #10 wire, you'll need to have your sparky run a new circuit or maybe even a sub-panel if you're gonna go through that much trouble. Might as well do it proper. If it's #8 wire, you're good to go. #8 on a 40amp breaker is good for 7680W max connected continuous load.
If your service panel is in the garage, this is a no-brainer. Few hundo at the most. If he's gotta run a line from the basement or across the building somewhere, you could run upwards of 500 to a grand, depending on how far and how much wire is required and how crazy you wanna get with your setup. Material costs will also depend on whether you need receptacles and timers installed or if you're just going to plug in one of those control boards like someone posted above. Materials for doing a subpanel with receptacles and a good industrial timer could cost a couple hundred as well.
Good luck, and don't forget to tip the guy too. We take Benji's and/or buds.
wdcf
Active member
I am running 6800w off of a Dryer outlet with this.
I will only be running 6000 watts from this breaker so I am going to have to go ahead with the GreenAir Product and will use a long high capacity extension cord for my CO2 and fans and reservoir etc.
...Unless someone feels that is a stupid plan?
Thanks everyone
~WDCF
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