FUSE 100A
FUSE 100A
CORRECT POLARITY
Polarity Test Pad
Your Socket & See MFT5000 tester has a special polarity test function.
It is a little known fact that a system can be reverse wired with Live (Phase) to
earth/neutral and earth/neutral to Live (Phase) The sockets will all work and
conventional loop testers will show and test that everything is correct despite
this very dangerous wiring condition.
Although extremely rare, this dangerous condition can exist so if your test shows
this fault do not proceed - if in any doubt advise your customer to contact their
supply company immediately.
Touch the touchpad area next to the test button. There should be no change in the
indication given. If the Voltage/Polarity LED flashes Red and a warning tone is emitted
when the touchpad is touched a potentially dangerous polarity reversal exists. Do not
proceed. If in any doubt advise the customer to contact the electricity supply
company immediately.
L
I
V
E
N
E
U
T
R
A
L
Supply
Supply
Reverse
N
E
U
T
R
A
L
L
I
V
E
Live to meter
Live to meter
Neutral to meter
Neutral to meter
To main earth terminal
To main earth terminal
Brass connecting to block
Brass connecting to block
15
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