6
3. Turn on the power to the circuits being tested where necessary.
4. Refer to table 1 to determine the phase presence and the phase
sequence of the wiring being tested.
If all phases are present then all phase LED’s and the relevant phase
sequence LED will illuminate. (see Note 3).
If a phase is missing then only the LED of the missing phase will
illuminate. The phase sequence LED’s should be ignored when a
phase is missing.
Warning
Where a 3-phase distribution system is found to have a wiring error,
maintenance should only be carried out by a competent electrician
who is familiar with the relevant regulations, the safety risks involved
and the consequent normal safe working practices.
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PC15250 Indication
Wiring Condition
L1
L2
L3
THREE LIT: CORRECT
ONE LIT: THAT PHASE FAULTY
PHASE
PHASE SEQUENCE
L1
L2
L3
L1
L2
L3
L1, L2 & L3 LED’s
illuminate red.
Phase Sequence L1L2L3
LED illuminates red.
(See Note 1)
All phases present.
Phase sequence is
L1, L2, L3.
L1
L2
L3
THREE LIT: CORRECT
ONE LIT: THAT PHASE FAULTY
PHASE
PHASE SEQUENCE
L1
L2
L3
L1
L2
L3
L1, L2 & L3 LED’s
illuminate red.
Phase Sequence L1L3L2
LED illuminates red.
(See Note 1)
All phases present.
Phase sequence is
L1, L3, L2.
L1
L2
L3
THREE LIT: CORRECT
ONE LIT: THAT PHASE FAULTY
PHASE
PHASE SEQUENCE
L1
L2
L3
L1
L2
L3
L1 illuminates red.
Ignore phase sequence
LED’s.
Phase L1 is missing.
L1
L2
L3
THREE LIT: CORRECT
ONE LIT: THAT PHASE FAULTY
PHASE
PHASE SEQUENCE
L1
L2
L3
L1
L2
L3
L2 illuminates red.
Ignore phase sequence
LED’s.
Phase L2 is missing.
L1
L2
L3
THREE LIT: CORRECT
ONE LIT: THAT PHASE FAULTY
PHASE
PHASE SEQUENCE
L1
L2
L3
L1
L2
L3
L3 illuminates red.
Ignore phase sequence
LED’s.
Phase L3 is missing.
L1
L2
L3
THREE LIT: CORRECT
ONE LIT: THAT PHASE FAULTY
PHASE
PHASE SEQUENCE
L1
L2
L3
L1
L2
L3
All LED’s illuminated red.
Two test probes
possibly connected
to the same phase.
T
a
b
le 1
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8
Note:
Neutral and earth connections are not tested. The tests will
not simulate your normal usage load.
Note 1:
If none of the LED’s illuminate, this does not necessarily
mean all three phases under test are dead. Two phases
could be open circuit, but one phase could still be live.
Note 2:
The colours of the cables under test cannot be relied upon
to conform to the expected phases.
Note 3:
This instrument only confi rms the presence of live phases
and the phase sequence in the location being tested. E.g.
A phase marked as “L1” elsewhere in the fi xed installation
may not be the same phase as one marked as “L1” in the
location being tested. That must be verifi ed by separate
tests to confi rm absence of phase offset.
3.5 Wiring Colour Coding
In April 2004 the colour coding of UK wiring was harmonised with
the IEC wiring colour code. Table 2 shows the old UK colour code
and the new IEC colour code.
Earth
Neutral
Line 1
Line 2
Line 3
Old UK
Colours
Green /
Yellow
Black
Red
Yellow
Blue
New IEC
Colours
Green /
Yellow
Blue
Brown
Black
Grey
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4. MAINTENANCE
4.1 Fuse Replacement
To avoid shock, injury or damage to the voltage indicator,
disconnect it from any external circuits before proceeding.
Replace only with the fuse specifi ed. Martindale order code:
FUSE500 (pack of 3).
The PC15250 is fi tted with three 600V 0.5A 50kA HRC rated fuses
(6x32mm), one in each probe. They can be replaced by unscrewing
the probes as show below.
4.2 Cleaning
The unit may be cleaned using a soft dry cloth. Do not use moisture,
abrasives, solvents, or detergents, which can be conductive.
4.3 Repair & Service
There are no user serviceable parts in this unit other than those that
may be described in section 4. Return to Martindale Electric if faulty.
Our service department will quote promptly to repair any fault that
occurs outside the guarantee period.
Before the unit is returned, please ensure that you have checked the
unit and fuses.
4.4 Storage Conditions
The instrument should be kept in warm dry conditions away from
direct sources of heat or sunlight, and in such a manner as to
preserve the working life of the unit. It is strongly advised that the
unit is not kept in a tool box where other tools may damage it.
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