BS1361 Consumer Unit Fuses
BS1361 Fuses
5, 15, 20 and 30 Amp BS1361 Fuses
BS1361 is the British Standard for some of the very common fuses found in your fusebox / consumer unit.



From the big MF to the small LA



These are BS1361 type 1 fuses, used in your consumer unit
Type
Amps
 Colour
 Length
 Diameter
 Typical application
LA5
 LA5 Fuse 5
 WHITE
 23mm
 4.8mm
 Lighting
LC15
 LC15 Fuse
 15
 BLUE
 26mm
 6.4mm
 Immersion heater
LC20
 LC20 Fuse
 20
 YELLOW
 26mm
 6.4mm
 Heaters
LD30
 LD30 Fuse
 30
 RED
 29mm
 8.0mm
 Sockets, cookers and small showers
LK45
 LK45 Fuse
 45
 GREEN
 35mm
 9.5mm
 Larger showers

Watch out for the little 5 Amp fuses, they look like a fuse out of a plugtop, but they are a bit smaller. It's very common to blow one of these little fuses if a bulb blows (there is a big surge of current at the instant a bulb pops).


These are BS88 fuses, often used alongside BS1361 fuses
Type
Amps
 Colour
 Length
 Diameter
 Typical application
LC10
 LC10 Fuse
 10
 BLACK
 26mm
 6.4mm
 Misc
LK35
 LK35 Fuse
 35
 BLACK
 35mm
 9.5mm
 Showers


These BS1361 type 2a fuses are used to cover an entire house
Type
Amps
 Colour
 Length
 Diameter
 Typical application
ME60
 ME60 Fuse
 60
 BLUE/WHITE
 57mm
 22.23mm House service cut-out
ME80
 ME80 Fuse
 80
 BLUE/WHITE 57mm 22.23mm
 House service cut-out
Other sizes are available from ME5 (5 Amp) to ME100 (100 Amp)

These BS1361 type 2b fuses are used to cover an entire house
Type
Amps
 Colour
 Length
 Diameter
 Typical application
MF60
 MF60 Fuse
 60
 BLUE/WHITE 57mm 30.16mm
 House service cut-out
MF80
 MF80 Fuse
 80
 BLUE/WHITE 57mm 30.16mm
 House service cut-out
Other sizes are available from MF20 (20 Amp) to MF100 (100 Amp)

Click here or on the SHOP link at the top of the page to go to our on-line store