Upstairs lights turn of from switch board only when it rains

[2story]

Hi newly build house and I've noticed when it rains the upstairs lights turn of from main switch board help

 

[PrenticeBoyofDerry]

Does you mains board have RCD protection on it?
Water ingress could cause protective devices to operate and turn off the circuit.

 

[winston1]

New build house, surely there must be a guarantee, get them to sort it.

 

[2story]

I'm waiting for the Electrican to get back to me
But it's just the upstairs lights and power points the rest of the ground
Floor works so I just switch it back on from the
Switch board
Could water be getting to the cables

 

[JohnD]

you have a water leak. Find and fix it. Is there perchance an outdoor lamp, which is connected to the upstairs lighting circuit, and is also exposed to the rain?

p.s.
Are you working on a smart
Phone? The curious way your
Lines change and capital
Letters seem to appear in the
Middle of sentences seems quite
Odd.

 

[2story]

Yes I'm on iphone lol
Also yes I have a sensor light outside connect
a power point in the bedroom so that must be the problem
cause when it rain the power goes out only upstairs