I bought a cover for a 4″ metal electrical box. It says “Underside” stamped on one side. I’ve seen this before, and the question remains, What’s the difference???? This is a flat, stamped metal plate which is absolutely symmetrical left-to-right, one-side-to-the-other-side. Why in the world would the manufacturer specify an inside to a plate?
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story

Listeners write in about insulating behind stucco and ask questions about basement finishing and a “leaky” chimney
Featured Video
How to Install Cable Rail Around Wood-Post CornersHighlights
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Replies
I'm curious myself, I'll be watching.
It was supposed to say " Made In Underside" dadgum Chinese can't get anything right.
Spheramid Enterprises Architectural Woodworks
Repairs, Remodeling, Restorations
"If Brains was lard, you couldn't grease much of a pan"
Jed Clampitt
View Image
isnt there a town in china called USA
Japan I think. maybe chineer too.Spheramid Enterprises Architectural Woodworks
Repairs, Remodeling, Restorations
"If Brains was lard, you couldn't grease much of a pan"Jed Clampitt
View Image
Generally one of the screw holes is a sideways slot that is asymmetrical. Presumably there's a "right" way to orient this (so tightening the screw won't make the plate "walk" off the screw). But in most cases this is of no consequence and the installer does whatever's most convenient.