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UK 240V Domestic Appliance Plugs
ColourCurrent
Brown13 Amp
Black5 Amp
Red3 Amp
Always use the size of fuse recommended by the manufacturer of your gadget. Fuses do not blow without a reason. When replacing a blown fuse, get the fault fixed before replacing fuse.
 
Old Electrical Fuse Box
Fuse ColourCurrent
White5 Amp
Blue15 Amp
Yellow20 Amp
Red30 Amp
Green45 Amp
You should not touch these fuses unless you are a qualified electrician. These are often old units and your electrician may suggest upgrading to safer RCB replacements. Tampering with these could have implications and you can expect insurance problems if you get it wrong!
 
Modern RCB Electrical Box
Many manufacturers use colour codes to indicate the trip rating. However, they usually "invent" their own colour codes - thus RCB colours will not reliably indicate their rating. For this reason, it is not possible to offer a reliable RCB colour guide.
Most RCB "fuses" have a switch which shuts off power when an electrical safety issue is detected. Once you have repaired the fault (e.g. unplugged a faulty appliance,) you should be able to manually put the swictch back into the ON position. A switch that refuses to reset is a clear warning that the power circuit is still unsafe.
 
Car Blade Fuses
ColourCurrent
Black 1A
Gray 2A
Violet 3A
Pink 4A
Tan 5A
Brown 7.5A
Red 10A
Blue 15A
Yellow 20A
White or clear25A
Green 30A
Dark Green 35A
Orange 40A
Always check the rating written on a fuse because you occassionally encounter "wrong colour" fuses. There is more than one type of blade fuse.
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