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WI-3
Allows holder to work isolated protection or metering equipment.
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OP-3
Allows holder to remove and replace LV cut out fuses.
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GP.4
States any person can object to do a job if safety issues arise and should be reported as such and it shall be resolved in an approved manner.
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Basic safety Rules 5, 6 & 8.
5. Isolation on LV apparatus. Lock off/ notices.
6. No signals or time intervals.
8.ID to remain identifiable during duration of job.
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Responsibilities of Persons C
- Work to safety rules,
- restore supply,
- complete paperwork,
- instruct end user.
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What should you always complete before starting work?
Carry out a risk assessment of the job.
Safety check and
Inspect tools.
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PSSI 12
- Safety from system
- Working/testing. LV app
- Lock off/ signs/ fuse removal
- Safety equipment.
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PSSI 17
Test tools/ PPE to prevent danger.
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Basic safety signs - Prohibition
Red. Must be complied with. Tells you that you can not do something.
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Basic safety signs - Warning
Yellow. Warning of a hazard.
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Basic safety signs - Safe condition.
Green. Safe notices showing information.
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Basic safety signs - Mandatory
Blue. Must be adhered to.
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What paragraph in PSSI 12 talks about metering and metering accessories?
12.3
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What are the dangers associated with LV Cut-outs,what to look out for.
- Broken fuse carriers,
- Burn & scorch marks,
- Poor wiring,
- Holes and gaps where fingers and instruments can access the cut out,
- No earthing,
- Reversed polarity,
- Tampering.
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How to use test lamps
- Proving unit.
- Single phase. Test L to N, L to E, N to E.
- 3 Phase L to N, L to L
lights: no light, normal, extreme bright light.
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Polarity testing
Use either martindale or test lamps to indicate correct polarity.
Ensure correct polarity at cut out and after meter.
Reversed polarity is dangerous and requires immediate attention.
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Phase rotation
Brown > Black > Grey
Phases are 120 degrees apart.
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What sort of cables would you expect to find at the cut out?
- Before cutout single phase armoured, steel wire armoured after cutout red and black grey double insulated 10mm 16mm 25mm.
- Earthing cables green and green and yellow.
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What are the new 3 phase and neutral colour codes?
Phase - brown, black, grey
neutral - blue.
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What are the old 3 phase colour codes?
Phase - Red, Yellow, Blue
Neutral - Black
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What PPE is required when working on Scottish Power Equipment?
- Face mask,
- Fireproof clothing,
- Insulated rubber gloves,
- Leather gauntlets,
- Safety boots,
- Fire retardant Apron,
- Safety glasses
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What type of insulated rubber gloves should be worn?
Class 1 is required.
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What voltage are the gloves rated to
7500v
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What is the shelf life of the insulated rubber gloves?
1 year
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How long can you use your insulated rubber gloves?
6 months use or less if damaged.
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What voltage are the insulated tools rated to?
1000V
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What is isolation? How to control and identify the Point of isolation.
Disconnected by an isolating device in the isolating position, or by adequate physical separation or sufficient gap.
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