Running electrical wiring inside lightweight walls requires careful planning, and the EPS Cement Sandwich Wall Panel provides a very friendly base for safe, tidy hidden electrical system installation. Use a portable grooving machine to carve shallow linear channels on the surface of the EPS Cement Sandwich Wall Panel, with a maximum depth no more than one third of the total panel thickness, to avoid weakening the panel’s structural strength. Lay the PVC electrical conduit inside the carved groove on the EPS Cement Sandwich Wall Panel, and secure it in place with special cement based fixing putty instead of drilling through the full panel. Never run multiple high power power cables inside the same groove on the EPS Cement Sandwich Wall Panel, to avoid potential overheating risks that could affect the panel material. After you finish all electrical testing to confirm the circuit works correctly, use anti crack joint filler to completely fill the groove and restore the flat surface of the EPS Cement Sandwich Wall Panel. This wiring method creates a fully hidden, safe electrical system that does not damage the structural performance of your wall in any way.