Designers and makers of electrical systems should ensure adequate maintenance regimes with routine inspection and testing (BS 7671, IET Guidance Note 3, CIBSE Guide K). Visual inspection frequency should reflect risk and environment (for example mental health or high-traffic areas) and damage found should be made safe and treated as urgent. Inspections need limitation-of-access documents (understanding that excessive limitations can make the condition report worthless), testing needs a safety document or sanction for test, and isolation needs permission for disconnection coordinated with users. Complete testing of final circuits should be scheduled as planned preventive maintenance every three to five years to BS 7671, set by risk; faults found should be made safe and treated as urgent; records should satisfy BS 7671 and makers; feedback should inform the programme.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.