How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Mike Your Own Question
Mike, Master Electrician
Category: Electrical
Satisfied Customers: 1425
Experience:  Licensed Master Electrician - OnQ Certified Data Voice Audio Video Installer
Type Your Electrical Question Here...
Mike is online now
A new question is answered every 9 seconds

Jason, I have a problem with tripping outdoor lights. They

Customer Question

Hi Jason, I have a problem with tripping outdoor lights. They are 240v, the connector is underground and is designed to be so. I've dug it up, opened it, dry as a bone and when not buried, does not trip.
Submitted: 1 year ago.
Category: Electrical
Expert:  Jason replied 1 year ago.
Hello. Welcome to Just Answer.
Expert:  Jason replied 1 year ago.
Are you able to post a photo of the connector here?
Customer: replied 1 year ago.
Here you go, connector is by Pratley.
Expert:  Jason replied 1 year ago.
Thank you for posting the photo. In over 20 years in the electrical industry, I've never seen a box quite like that. Is this a US installation?
Expert:  Jason replied 1 year ago.
I see that you are in the UK. I had to open a new window to get that info.
Customer: replied 1 year ago.
More info for you. I place the connector underneath a ridge tile and block both ends best I can to divert water around the Connector ( South African ). There are other runs of lights which are totally fine ( 6 other such connections ). Just this one that's a pita.
Customer: replied 1 year ago.
Yes, I'm in Nottingham
Expert:  Jason replied 1 year ago.
Does the cover for the box have a gasket on it?
Customer: replied 1 year ago.
Here's a bit more info for you. Sometimes it would take 10 minutes before tripping the RCD. Yes there is a gasket, it's intact and the inside of the junction box is totally dry.
Expert:  Jason replied 1 year ago.
Have you inspected the wire itself, near the junction box? It's possible the jacket on the wire has a small opening in it, and that's causing the short if the soil gets moist.
Customer: replied 1 year ago.
Will go check
Expert:  Jason replied 1 year ago.
Here in the US, junction boxes in the ground are required to be installed so that the cover is at ground level. In other words, they aren't allowed to be completely concealed below dirt. Do you have the same Code in the UK?