23
Fault Finding

Preliminary Electrical Systems CheckPreliminary Electrical Systems Check

Preliminary Electrical Systems CheckPreliminary Electrical Systems Check

Preliminary Electrical Systems Check

STARTSTART
STARTSTART
START
Isolate appliance
and carry out:
A:A:
A:A:
A: Earth Continuity
check.
Has inlet fuse blown?
Carry out:
C:C:
C:C:
C: Polarity check.
Electricity supply
should now be
satisfactory.
Carry out:
D:D:
D:D:
D: Resistance to
Earth check.
Inlet wiring
faulty.
Rectify any
fault.
Isolate appliance and
carry out:
B:B:
B:B:
B: Insulation check.
Rectify any fault
including replacing
fuses as necessary.
NONO
NONO

NO YESYES

YESYES
YES
SOCKETSOCKET
SOCKETSOCKET
SOCKET
(face view)(face view)
(face view)(face view)
(face view)
PLUG (with cover removed)PLUG (with cover removed)
PLUG (with cover removed)PLUG (with cover removed)
PLUG (with cover removed)
Earth Wire
Green/Yellow
Neutral Wire
Blue
( )
FUSE
( )
E
NL
NONO
NONO

NO YESYES

YESYES
YES
Brown Blue
Green
Yellow
Brown
Blue