Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Suggested Answer
  • Locked Locked
  • Replies 64 replies
  • Answers 1 answer
  • Subscribers 38 subscribers
  • Views 10578 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Bonding in greenhouse

Alan B

On an eicr

I have a greenhouse connected to a sub DB in an outhouse, which is on a TT earth. Circuit is protected by upstream 30mA and 100mA RCD's.

I am debating in my mind if the frame of the greenhouse should be bonded to the single socket in the green house.

I would consider the frame as an extraneous part and therefore first reaction is to bond it.

But then thinking about it. bonding would reduce the risk of shock inside the greenhouse in the case of the socket became live but increase the risk of shock outside the greenhouse if the socket and greenhouse became live.

On balance I am tempted to go with not bonding, what are your thoughts?

Parents
  • 0

    If the greenhouse is not a building then how would you define it

    Perhaps a "garden structure" (at least in a domestic setting). BS 7671 gives us no definition to work with but my thinking is that it's rather unlike most buildings where it would be reasonable to try to create the equipotential zone that 411.3.1.2 is all about (reasonably dry, or non-conductive construction) . In most respects the inside of a greenhouse is much more like outdoors than indoors of most buildings.

    There's a whole range from structures from tiny lean-to greenhouses (not much more than a tall cloche) to car ports to dolls houses that might well fall under some people's dictionary definition of a building, but nevertheless wouldn't be sensible to treat as such from a wiring regs point of view. We have to fall back on our engineering judgement.

        - Andy.

Reply
  • 0

    If the greenhouse is not a building then how would you define it

    Perhaps a "garden structure" (at least in a domestic setting). BS 7671 gives us no definition to work with but my thinking is that it's rather unlike most buildings where it would be reasonable to try to create the equipotential zone that 411.3.1.2 is all about (reasonably dry, or non-conductive construction) . In most respects the inside of a greenhouse is much more like outdoors than indoors of most buildings.

    There's a whole range from structures from tiny lean-to greenhouses (not much more than a tall cloche) to car ports to dolls houses that might well fall under some people's dictionary definition of a building, but nevertheless wouldn't be sensible to treat as such from a wiring regs point of view. We have to fall back on our engineering judgement.

        - Andy.

Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines