How to deal with a thick wire in a mounting nipples for a chandelier?
Call the manufacturer for assistance or see if you can get heavy duty hardware at an electrical supply store. The included hardware may be low-grade &amp; drilling the nipple hole more than a millimeter larger may cause a safety issue. The heavy duty stuff you can drill no problem, if needed. The canopy cover will likely then also need to be slowly drilled so a bigger nipple can fit through.