On Sep 23, 7:53*pm, DerbyDad03 wrote:
Let's say I need to extend some wires that run in the joist space below a
crawl space attic above a bathroom. The crawl space has 1 x 4 flooring.

I know I can't simply remove the floor boards, install the junction box and
then conceal it with the floorboards.

However, can I replace the cut out floorboards with a piece of plywood with
an acrylic insert so that the junction box can be seen from above?

The plywood would be big enough to be used as an access panel spanning the
joist bay, the "window" would be large enough for the junction box to be
clearly visible.

If not acrylic, what about a steel grate?

Can you make the acrylic large enough to access the box and its cover
and the bushings through the edges of the box that secure the wire?
Maybe put a handle on the acrylic to make it easy to lift out of its
recess in the plywood and more visible to anyone who is in the attic.
Maybe someone with a lot of time can review the NEC.