RoSPA NI : Electricity and You
Fuse Boxes
Fuses
Rewirable fuses
Remove and examine the fuses in turn; look for wire breaks or scorch marks on the fuse carrier. Fit new fuse wire as follows:
Loosen retaining screws and remove old wire. Wind new wire of the correct rating clockwise round one screw. Tighten screw. Thread wire through fuse carrier (see dotted line) to other screw and wind it round clockwise, leaving a little slack. Tighten screw and cut off surplus wire. Replace fuse carriers. Refit the fuse box cover and switch on the main switch.
Cartridge fuses
Replacement is straightforward unscrew the fuse carrier, fit a new fuse of the correct rating (see right), re-assemble the carrier and screw tight. Replace the fuse carriers, put back the fuse box cover and switch on the main switch.
Checking cartridge fuses
Remove the base of a metal cased torch. Place one end of fuse on bottom of battery and other end on torch casing. If bulb fails to light when the torch is switched on, the fuse has blown.
Which fuse to fit?
Always fit fuses of the correct rating for the job. Never use a larger cartridge fuse or a thicker wire in a rewirable fuse, even as a temporary measure. Don't rely on the rating of the blown fuse, it may have been the wrong one in the first place.
REMEMBER: always switch off before changing fuses
Lighting circuit - 5amp
Immersion heater - 15 amp or 20 amp
Ring main (socket outlets) and average size cooker - 30 amp
Large cooker - 45 amp
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RoSPA is a registered charity: Registered Charity No: 207823 Patron: Her Majesty the Queen RoSPA Head Office: Edgbaston Park, 353 Bristol Road, Edgbaston, Birmingham B5 7ST, UK |
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