Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Turn Hot Water Tap On
Attach red crocodile clip to brown wire
Attach black crocodile clip to a suitable earth point
Attach black crocodile clip to a suitable earth point
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure the voltage between the brown wire and a suitable earth.
Note 1:
The design of switches may vary from appliance to appliance.
Note 2:
Crocodile clip should always be connected to the brown wire irrespective of which spade it is connected to.
Note 1:
The design of switches may vary from appliance to appliance.
Note 2:
Crocodile clip should always be connected to the brown wire irrespective of which spade it is connected to.
Isolate as per TOPs P4
and refit as necessary