6
OPTION 1:
NO EARTH LOOP MONITORING
Bridge the earth OUT to earth RETURN. The unit will now function as per the
old version WIZORD.
OPTION 2: EARTH LOOP MONITORING; GOOD SOIL EARTHING
OPTION 3: EARTH LOOP MONITORING; POOR SOIL EARTHING
MERLIN 4
Connection To The Fence
230VAC
MAINS
OUT
RETURN
FENCE
EARTH
T
O
F
E
N
C
E
E
A
R
T
H
RET
RET
OUT
F
E
N
C
E
OUT
T
O
F
E
N
C
E
Earth spike at minimum 1m depth,
and not within 2m of any other
electrical earth connections
E
A
R
T
H
RET
RET
OUT
F
E
N
C
E
OUT
T
O
F
E
N
C
E
TO FENCE
This earth wire
is not coupled to
the fence earth
at any other
point
