14-10-2015, 05:54 PM
What a coincidence, after a long delay (years) I finally connected the caravan in the garden to our house supply two days ago, I should mention at this stage that the caravan is not a metal one, it's of timber construction, the water supply comes in via the usual blue plastic water pipe buried underground, it rises out of the ground to connect to the caravan, from then on in it's copper pipe inside.
The feed cable is armoured 3 core (10mm square conductors) fed from the split box consumer unit in the house, rightly or wrongly I've earthed the protective galvanized multi wire sheath at the consumer unit end only, two of the cores are live & neutral, the other core is earth (exported) that earth is exported from the earth bus bar in the house consumer unit.
In the caravan the armoured cable feeds a four way consumer unit and an electric shower, the four light/socket circuits from the consumer unit are RCD protected and all have MCB's, the feed to the electric shower is directly from the the armoured cable input to the consumer unit via a separate shower RCD/MCB unit, all the copper pipes in the caravan are electrically bonded with 6mm earth cable which is connected to the caravans consumer unit earth (the exported earth from the house) I did all the main wiring some years ago, I've got some 10mm earth cable spare, should the 6mm bonding earth cable within the caravan be changed to 10mm?
The caravan feed from the house consumer unit is via an MCB and RCD within the consumer unit, the MCB and RCD are suitably rated.
The incomer earth from the DNO is PME.
I've consulted various sources as to whether or not it should be TT'd, some say do, some say no need, anyone know for sure given the system described?
Anything else I need to think of?
Lawrence.
The feed cable is armoured 3 core (10mm square conductors) fed from the split box consumer unit in the house, rightly or wrongly I've earthed the protective galvanized multi wire sheath at the consumer unit end only, two of the cores are live & neutral, the other core is earth (exported) that earth is exported from the earth bus bar in the house consumer unit.
In the caravan the armoured cable feeds a four way consumer unit and an electric shower, the four light/socket circuits from the consumer unit are RCD protected and all have MCB's, the feed to the electric shower is directly from the the armoured cable input to the consumer unit via a separate shower RCD/MCB unit, all the copper pipes in the caravan are electrically bonded with 6mm earth cable which is connected to the caravans consumer unit earth (the exported earth from the house) I did all the main wiring some years ago, I've got some 10mm earth cable spare, should the 6mm bonding earth cable within the caravan be changed to 10mm?
The caravan feed from the house consumer unit is via an MCB and RCD within the consumer unit, the MCB and RCD are suitably rated.
The incomer earth from the DNO is PME.
I've consulted various sources as to whether or not it should be TT'd, some say do, some say no need, anyone know for sure given the system described?
Anything else I need to think of?
Lawrence.
