Here's what we do to meet the Shedule of Inspection

• Visual Inspection
• Continuity
• Polarity
• Earth Loop Impedance
• Insulation Resistance
• Operation of Devices for I and S
• Residual Current Devices

Polarity.

Testing is carried out to verify:

• That the polarity is correct at the meter and consumer unit/distribution board.
• Single-pole control and protective devices are connected in the phase conductor only.
• Conductors are correctly connected to socket-outlets and other accessories/equipment.
• Centre-contact bayonet and Edison-type screw lamp-holders have their outer or screwed contacts connected to the earthed neutral conductor.
• All multi-pole devices are correctly installed.