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13A one gang pattress (back box) extender — image 1
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13A one gang pattress (back box) extender

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This is a design for an extender to allow the two to fit securely which splits into two halves.

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I replaced a 13A mains socket with a smart+ zigbee socket but found the old pattress (back box) was not compatible and the socket did not fit flush.  The solution was to make an extender or replace the pattress.  

This is a design for an extender to allow the two to fit securely which splits into two halves so it can be fitted without removing the wiring.  It holds together with two 2mm holes which can therefore use a 40mm x2mm dowel or a 40mm piece of filament and has an inner lip to make sure it stays in place.

Be safe:  Make sure the power if off before making any changes to a power socket, or ask a qualified electrician to do it for you.

I have included pictures of the installed extender and it on its own.  I printed mine in ASA so it was heat and UV safe.

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