Old Electrical Equipment - MEMERA 3 plastic 4 way fusebox

A plastic case fusebox with four rewireable fuses.

Four way

MEMERA 3 four way plastic fusebox MEMERA 3 fusebox with plastic cover The four fuses are located behind a transparent grey plastic cover.

The cover just clips into place, no tools required to remove it.

The four fuseways are marked 13A SOCKS, LIGHTS, IMERSION, COOKER.

Hopefully that really means 13A Sockets, and they actually meant to spell IMMERSION heater properly.

External

MEMERA 3 fusebox with four fuses MEMERA 3 fusebox main switch The main switch is the typical style with a sliding plastic piece to indicate on or off.

The front cover is secured with two screws, which can be seen either side of the row of fuses.

Fuses shown from left to right are 30A, 5A, 15A, 30A.

Removing fuses

MEMERA 3 rewireable fuses and shields MEMERA 3 fusebox with fuses removed The fuses just pull out, and are the rewireable BS3036 type.

The fuses and bases are colour coded - red for 30A, blue 15A, white 5A. The other 20A type not shown here were yellow.

Fuse shields are fixed with a single screw.

Back

Moulded plastic back of a MEMERA 3 rewireable fusebox Moulded plastic back of a MEMERA 3 rewireable fusebox The back is moulded plastic, with several knock-out sections for wiring to enter.

The earth bar is at the top left.

Back Text

Text moulded into the back of a MEMERA 3 fusebox MADE IN ENGLAND

BX1017-1

The oval MEM logo is also included.

Front Cover

Front moulded plastic MEMERA 3 fusebox cover Warning label inside a MEMERA 3 fuse box The front cover is a single piece of moulded plastic, fixed to the base with two screws.

A label inside warns that unused ways must be covered with a blank shield 00 QLS.

This particular box had all four circuits in use, so this part was not required.

Smoked Plastique

MEMERA 3 smoked plastic front cover MEMERA 3 smoked plastic front cover The fuses are covered with a smoked grey transparent plastic piece. This clips into place via three tabs, and can easily be removed by anyone.

Cover Label

MEMERA 3 information label The label inside the cover lists the various sizes of fusewire, part numbers for cartridge fuses, and part numbers for circuit breakers.

Any of the three types could be fitted, with circuit breakers (MCBs) being the least common as they were the most expensive choice.

Fuses

Ceramic rewireable MEMERA 3 fuse Ceramic rewireable MEMERA 3 fuse These fuses are semi-enclosed rewireable types to BS3036. The replaceable fusewire passes through the hole in the centre of the ceramic and is fixed under the screw at either end.

While these are still permitted and are perfectly servicable, they are very easy to misuse.

Typical issues include the wrong fusewire being fitted, fusewire being fitted incorrectly, or other types of wire being shoved in.

The fuse here is 15A, colour coded blue.

Fuses - Additional views

MEMERA 3 rewireable fuse, BS3036 MEMERA 3 rewireable fuse, BS3036 MEMERA 3 rewireable fuse, BS3036

Internals 1

Internal view of a MEMERA 3 plastic fusebox Internal view of a MEMERA 3 plastic fusebox, fuses removed The fuses just pull out, and the shields are fixed with a single screw.

The contacts behind each shield are identical, so that any rating of device can be installed in any position.

Internals 2

Internal view of a MEMERA 3 plastic fusebox with shields removed Internal view of a MEMERA 3 plastic fusebox with shields removed Here, all of the shields have been removed to show the contacts behind.

Chassis - Front and rear

MEMERA 3 four way fusebox chassis MEMERA 3 four way fusebox chassis The chassis is fixed with two screws, and is easily removed as a complete unit.

This is to make installing the unit easier - the backplate can be fixed and wiring drawn in without the chassis in place.

Note the fuseway 2nd from left has significant burning damage. This was the 5A lighting circuit, which in this particular property had several severe cable faults which caused the fuse to blow on a regular basis.

Chassis - Above and below

MEMERA 3 four way fusebox chassis MEMERA 3 four way fusebox chassis Outgoing circuits connected to the top of each fuseway. Neutrals to the 4 way block immediately above the main switch.

The incoming terminals on the switch are recessed to reduce the possibility of fingers or other objects contacting them - both the screws and terminals are live even with the switch in the off position.

 

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