
Fault Finding | Brown  | 
  | Green  | ||
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  | Blue  | |
Preliminary Electrical Systems Check | 
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  | Yellow  | ||
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  | START  | 
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  | Isolate appliance  | 
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  | Blue  | 
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  | Green  | |
  | and carry out:  | 
  | Brown  | 
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  | A: Earth Continuity  | 
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  | Yellow  | 
  | check.  | 
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NO
YES
Carry out:
C:Polarity check.
Carry out:
D:Resistance to Earth check.
Has inlet fuse blown?
NO
Inlet wiring
  | 
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  | Electricity supply  | ||
  | 
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  | should now be  | ||
YES  | |||||
satisfactory.  | |||||
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PLUG (with cover removed)  | SOCKET  | 
  | (face view)  | 
faulty. Rectify any fault.
Earth Wire Green/Yellow
Neutral Wire Blue
(  | )  | 
  | FUSE  | 
E(
)
NL
Isolate appliance and carry out:
B:Insulation check. Rectify any fault including replacing fuses as necessary.
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