Question on wire size for 30a
I need to install a 30a RV outlet on the side of our house for our trailer. I need to go about 60 feet from the panel. Would 10/2 Romex be sufficient, or should I go bigger?
Forum Discussion
You're getting a lot of incorrect answers regarding your question. A simple answer is: Yes, 10AWG will meet the NEC electrical code requirements for a 30amp load.
Here's the deal:
In most jurisdictions of the United States, electrical wiring is installed to the requirements of the National Electrical Code table 310.15 B 16. If you refer to the table, you will see that AWG10 will meet the amperage requirements of your load at all rated wire styles and temperatures. In fact, if you used THHN wire, you could use AWG12 for a 30 amp load. THHN is what is commonly sold in home improvement stores. Personally, I'd go with AWG10 and you'll have no problem meeting the requirements. Here's a link to the table:
NEC Table 310.15b 16
Two years ago, I installed a 30amp circuit for my RV. It was part of a significant remodel of my home, and I obtained a building permit. My run was 80 feet. As part of the building permit process, my plans were approved by my building department, and I passed inspection once it was installed. I used THHN AWG 10 for my application which is actually rated for 40 amps at 90C.
With all that said, you need to make sure your run won't drop the voltage too far. You'll still be within code requirements, but you could have some loss. On my application, I have good voltage at the house, so I'm seeing approximately 116V at the 30A outlet.
Your profile information indicates you live in Upland California. If you install this project, you are required to get a building permit. I'd call the building department to verify this, but according to their website, the following information indicates the permit is required:
105.1 Required. Any owner or authorized agent who intends to construct, enlarge, alter, repair, move, demolish, or change the occupancy of a building or structure, or to erect, install, enlarge, alter, repair, remove, convert or replace any electrical, gas, mechanical or plumbing system, the installation of which is regulated by this code, or to cause any such work to be done, shall first make application to the building official and obtain the required permit.
Hope this was helpful.
Jim
Here's the deal:
In most jurisdictions of the United States, electrical wiring is installed to the requirements of the National Electrical Code table 310.15 B 16. If you refer to the table, you will see that AWG10 will meet the amperage requirements of your load at all rated wire styles and temperatures. In fact, if you used THHN wire, you could use AWG12 for a 30 amp load. THHN is what is commonly sold in home improvement stores. Personally, I'd go with AWG10 and you'll have no problem meeting the requirements. Here's a link to the table:
NEC Table 310.15b 16
Two years ago, I installed a 30amp circuit for my RV. It was part of a significant remodel of my home, and I obtained a building permit. My run was 80 feet. As part of the building permit process, my plans were approved by my building department, and I passed inspection once it was installed. I used THHN AWG 10 for my application which is actually rated for 40 amps at 90C.
With all that said, you need to make sure your run won't drop the voltage too far. You'll still be within code requirements, but you could have some loss. On my application, I have good voltage at the house, so I'm seeing approximately 116V at the 30A outlet.
Your profile information indicates you live in Upland California. If you install this project, you are required to get a building permit. I'd call the building department to verify this, but according to their website, the following information indicates the permit is required:
105.1 Required. Any owner or authorized agent who intends to construct, enlarge, alter, repair, move, demolish, or change the occupancy of a building or structure, or to erect, install, enlarge, alter, repair, remove, convert or replace any electrical, gas, mechanical or plumbing system, the installation of which is regulated by this code, or to cause any such work to be done, shall first make application to the building official and obtain the required permit.
Hope this was helpful.
Jim
