Reduce Conduit Size to Enter Panel?

[tnurcz2]

Hi, I have a Homeline panel that is going to have 2 x 2" conduits entering the bottom of the panel. The one on the left is going to feed an outbuilding, the one on the right is the main entrance conductors. Unfortunately the knockout on the right is limited to 1 1/2" conduit. Can I reduce to 1 1/2" at the panel and run a 4/0, 4/0, 2/0 Triplex plus 4 AWG bare copper through that? I believe they will physically fit just want to make sure it will pass inspection. Swapping positions of conduit is not an option as they are already cast in concrete and feed opposite directions. Punching a new hole is problematic as it will impinge on neighboring smaller knockouts.

 

[roger]

The forum rules do not allow us to assist in DIY projects.

This site is designed for:

• Electrical Contractors
• Electricians
• Engineers
• Inspectors
• Instructors

* This NEC� Forum is for those in the electrical and related industries. Questions of a "How-To" nature by persons not involved in the electrical industry will be removed without notice.

You can visit diychatroom.com