junction box blocked by vanity cabinet
I am currently having my bathroom remodeled. Upon inspecting my newly installed vanity cabinet, I noticed that a junction box is 2/3 covered by the cabinet. One of the workmen cut a one inch wide strip from a plastic cover plate, and affixed it somehow over the left hand third of the junction box that extends from behind the new cabinet. When I look inside the cabinet (which has no back), I can see about 1/2 inch of the junction box opening and wires inside. The majority of the box is covered by the side of the vanity cabinet which is attached to the wall. The workmen told me this arrangement is just fine....but my reseach has revealed a junction box should be "accessible." The one in my bathroom does not seem very accessible to me.....Someone please advise, with code reference, if possible...so I can address this with the contractor. I live in California. Thank you!!