Yes, light curtains are Listed under the category Active Opto-Electronic Protective Devices (NIPF) in the UL White Book
This article looks at effective grounding and bonding, how it is defined by the Canadian Electrical Code, and its importance to electrical safety.
Electrical inspection processes and techniques differ and often are dictated by construction conditions. Using the NEC Electrical Toolkit is a guide to help out.
Within the NEC there are numerous electrical installation requirements that apply specifically to one-, two-, and multi-family dwellings.
Renovating those older systems adds flexibility through modern wiring practice and increases safety.