Electrician on board ?

[FAKKY]

Going to run a subpanel from my house toa new garage for my truck hobby workshop.
Pulling permit myself.

1st thing Im a little stuck on. Original thought was ....

240 - 50A.
6/3 NMB wire for 75ft through crawlspace.
Then 2224 mhf wire in conduit to subpanel underground with schedule 40 UL 175ft away.

Spliced with port multitap connector.

But - I cant quite work out if 6/3 combination with 2224 is ok over this distance - seems ok on some voltage drop calcs to remain under 3% and not ok barely on others. Big step up in $$ 2x to 4/3.

Can you use 2224 all the way ? or some other aluminum cable like SER of higher amperage/capacity.
I dont see many people do that in threads though.

thx

[67C10Step]

Perhaps a real electrician will come in but using the 6/3 at the beginning cuts your amp load carry to 60 right off while the 2224 is 90. Not to mention the junction is another place for a failure later.

Not sure on running the 2224 through your crawl space but I don’t think that’s recommended.

Wired my shop from my outside house panel with a 60 amp breaker and similar wire for about 140 feet to the shop panel.

[FAKKY]

Originally Posted by 67C10Step

Perhaps a real electrician will come in but using the 6/3 at the beginning cuts your amp load carry to 60 right off while the 2224 is 90. Not to mention the junction is another place for a failure later.

Not sure on running the 2224 through your crawl space but I don’t think that’s recommended.

Wired my shop from my outside house panel with a 60 amp breaker and similar wire for about 140 feet to the shop panel.

Hi
Yeah the 6/3 NMB is the crawlspace run.
The 2224 mhf is the underground conduit run last leg to shed panel oustide.

The 6/3 is rated at 55A for that at 60degreees so thats my max - would be a 50A circuit.

But he voltage drop depending on which tool you use is borderline to 3% --- not sure what inspectors use and what the junction box join does to that calc though.

I'll probably end up just jumping to 4/3 ....... but its 2x the price. At least it would be afer as well as allow for larger breaker - but still kinda curious how this is spec'd out.


Also any other options etc.

I might be able to go another route - essentially running a line back out to my fence but it essentially goes out the same location as the service in to the entire home ..... and would be straight conduit all the way. But on that appraoch which I was avoiding as it involves tearing up some landscapring not sure about....

any restrictions from running electric/pipe back out within along same path as utility service in to house from main ..... or pretty close ......

[Getter-Done]

I would go with the 4/3 wire and Buy once cry once.

I have seen a few issues in Mobile homes that have Aluminum wire that steer me clear from using it.

[FAKKY]

What do you use instead of mhf ? Then

[Getter-Done]

Originally Posted by FAKKY

What do you use instead of mhf ? Then

I retract my statement of .

Buy once cry once.

I just looked at the price.

I bought a couple of rolls of this (in the link below) about 10 years or so ago.
Looks like I need to build a fort around it.

Link: https://www.homedepot.com/p/Southwir...8205/202316202

[biketopia]

How big is your shop you're building? Would it be feasible to just add another service to your address with the utility company and then get a 100 or 200amp dedicated drop & not be worried about the capacity available from the house? It will give you some room to grow inside your shop and use higher amp tools if ever wanted, welder, compressor, run a mini split, etc...

[FAKKY]

Originally Posted by biketopia

How big is your shop you're building? Would it be feasible to just add another service to your address with the utility company and then get a 100 or 200amp dedicated drop & not be worried about the capacity available from the house? It will give you some room to grow inside your shop and use higher amp tools if ever wanted, welder, compressor, run a mini split, etc...

Never even thought of that ..... hmmm
Thnk it would be cost $$ prohibitive though but no real idea.

Right now looking at <$2k to do myself ....... versus the $8k quotes.
Figure its 5-6 days of work outside of the trenching.

Lucky for me just found out my sister is dating a brother of a commercial electrician - so now have access to some advise and maybe help there depending

[biketopia]

Originally Posted by FAKKY

Never even thought of that ..... hmmm
Thnk it would be cost $$ prohibitive though but no real idea.

Right now looking at <$2k to do myself ....... versus the $8k quotes.
Figure its 5-6 days of work outside of the trenching.

Lucky for me just found out my sister is dating a brother of a commercial electrician - so now have access to some advise and maybe help there depending

Knowing someone in the trade could very well help!! I'd at least reach out to the utility and get an idea. Sometimes they'll provide everything, sometimes you just have to pay for meter setting, others you're paying for lineman's labor and all. But a separate service would be my ideal route, if feasible within the budget and timeline.