I am installing some new windows ina family room.
I need to reroute a 110V and 220V line. To go around a metal I beam

Is it OK to splice these lines in a covered junction box that I place next to an outlet box (in the wall) ?

Also is it OK to run 110/220 V ROMEX wire along an I-Beam ?

Thanks
Stephen

Stephen,

A couple of questions and a clarification.

110 and 220 are no longer the standard voltages. You now receive 120 and 240.

1) What is the load for the 120 line 15 or 20 amp?
2) What is the 240 line for and what is the required amperage for that line.
3) Why are you going around the steel beam instead of through it?
4) Can you have the welder cut an access hole for you? Then you can get a
Rubber grommet to protect the cable as it passes through the hole.

Romex is a trade name use by a manufacturer of this type cable. NM-B is the cable designation.

To answer you initial question, yes the cables can be spliced inside of a junction bos, providing that the you do not violate the volume allowed by the box size. Also, the junction box must be easy to access the wiring inside the box's cover.

You need to know the volume used by the conductors inside the box. To get the correct size of wire, you need to know the amperage being delivered by the Branch Circuit Conductor. To get that you need to know what the amperage on the breaker is.

These are generally approved for use within the wall.

Modular Splice & Tap Kit - 194130062 (http://www.smarthome.com/7104.html)

Otherwise the junction box must be accessible. You can use a junction box with a blank plate as lomg as the plate is removeable without taking down the wall.

Romex can be run nest to an I-beam.