Metal cased consumer unit or distribution board.
The exterior is made from substantial sheet steel, with a steel door over the devices.
This one has a 63A RCD incomer and six MCBs of various ratings.
The front panel is secured with four screws, one in each corner. These have some corrosion due to the damp enviromnent this was installed in.
The MG logo on the top centre is a stick-on label.
Merlin Gerin Cat No. AMG 9
Type Tested to BS5485 : Part 12 and 13 : 1979
Incoming capacity 100A 50Hz 240/415V
Stafford Park 4, Telford, Salop
The six MCBs have clearly been rearranged at some point, as the labelling underneath makes little sense, and three of the labels have been completely blacked out with marker pen.
MG CEE27 current operated earth leakage CB
each month press test button T. the circuit breaker must trip.
63A 240V 0.03A EMG 630302
The French words 'test mensuel' are moulded into the plastic underneath the square white test button. (test monthly).
Incoming supply connected to the bottom terminals of the RCD (left side). Circuit wiring connected to the neutral bar (left side), earth bar (right side) and the bottom terminal of the individual MCBs.
4 module 63A 30mA RCD
The neutral from the RCD connects directly to the neutral terminal bat to the left, with the line extending across the top of the MCB positions.
Connections between the busbar and devices is made via a small forked metal piece.
In these photos, part of the plastic busbar covering has been removed to show the interior.
The metal fork which connects to the busbar is a separate item, and can easily be removed.
Although this has space for 4 incoming and 4 outgoing terminals, only two terminals are used on this model.