Search results

How do they create surges? When they're shut off and stop drawing current? Regardless, the voltage waveform always originates at the utility transformer or line and must pass through the service entrance panel before being distributed to the loads in the home. Maybe I'm thinking of it...

The black and white are counted as "current carrying" so you can have any combination of them up to 9 wires and only need to derate by 70% from the 90C rating of THHN. For #12AWG THHN you end up with 30A x 0.7 = 21A which must be protected at 20A anyway. 4 single phase circuits with individual...

I do see the intent of the plug or cord connector to keep people from opening potentially energized boxes to disconnect wires on a portable or serviceable piece of equipment, but I don't know how critical it really is. Someone mentioned that the disconnect lugs weren't rated for the fine...

Technically not if it's connected to an appliance or equipment that can be moved. It just came up recently. FWIW "400.7 Uses Permitted (A) Uses. Flexible cords and cables shall be used only for the following: (1) Pendants (2) Wiring of luminaires (3) Connection of portable luminaires, portable...

Ampacity is calculated using a multiplier from the table based on duty cycle. So 95A@40% duty is 95A x 0.69 = 66A effective #4CU is good for 70/85A in the 60/75C columns depending on the installation. #4SO cord is good for 70A as well. Overcurrent protection is allowed up to 200% of rated...

I think you've got consensus so I'm not going to dogpile. I've got a single unpainted PVC conduit to a pvc single gang box/switch in the basement bathroom from the PO and I feel disappointed every time I see it. :sad:

Haha. Yeah I thought of that, though I've never actually seen someone using a ground resistance tester to avoid driving another rod. Personally I prefer using building steel, concrete encased rebar, and a ground ring.:eyecrazy:

Up to 9 current carrying conductors (4 single phase circuits + 1 wire) whenever they are run together for at least 2 feet before 90C insulation temperature derating starts to matter.

Right. Space them at least 6 feet apart and drive them below grade. Maybe PatJ800 was thinking of the exception when the building is only served by a single branch circuit.

New thread with pics or it didn't happen. :bounce:

Sounds like the garage is attached. A detached building will have different requirements. How long do you plan on owning the space? How much and what kind of work do you plan on doing in the garage over the next couple years? What electrical tools/equipment could you see yourself buying/using...

Good feedback. I have contact info now, just have to wait out the holiday. I would prefer to have the important parts inspected and legit. Really seems to come down to the people in charge (doesn't it always). Yeah, I was just being tongue in cheek to get a rise outta the electrical guys. I...

I know the feeling. Is there a nameplate or schematic on the door/cover of the panel? Ask your electrician friends about moving ckts #2,#4 to the bottom of the panel and using that space for a 60A, 2 pole breaker. Tell them you just want to KISS... and that you don't have any money:p

Re: Got air!!!! Haha, No I'm just an engineer, not an electrician. I'm licensed to understand how it works, just not to work the magic to make it reality. :beer:

Re: Got air!!!! The only thing I have left to say is... :drool:

:lol: Hilarious Yeah, I have seen and done things with electricity that would make baby Jesus weep. Sometimes people/companies spend 5x what they need to on things that will never be operated anywhere near their ratings too. When you're licensed and work with code issues you have a duty to...

You're right, and this is one of the exceptions. I ask for grounding bushings when the metallic sweeps stub up above grade. NEC 250.80 Service Raceways and Enclosures "Metal enclosures and raceways for service conductors and equipment shall be connected to the grounded system conductor if the...

Nice job on the install. Is the equipment ground conductor bare? Usually the X/3 marking counts the insulated conductors. You could go nuts and tape the white conductor red just so everyone knows its a phase conductor. I don't know if its required or not. I agree with Aceman on this one...

This is true and its tough to use more power than that at one time in a one bay space. A 60A breaker lugs usually fit #2 wire and it will let you upgrade later if your needs change. Add up the load amps of all the lights and equipment you anticipate using at the same time and see what you get.

:drool: Where are you seeing $7 sheets of R7. The stuff I was looking at is R5/inch of thickness and 4x8 sheets were $20!!