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Blue Duck

Weird high frequency noise from conduit?

Question

Blue Duck

Trying to get an SWA in a riser, well I'm trying to but the chippy who is supposed to be helping me keeps wondering off! headbang

 

Anyhow, halfway up the riser I noticed a high pitched whine coming from the conduits feeding the flats above.

I was a little concerned so I checked the distribution cupboard and had a listen further up the riser and nothing, just in the middle. :C

 

It's an ancient setup, all Bill switchgear and imperial cables, VIR yum.

There is also a Porn & Dunwoody lift. :lol:

 

There is fire alarm and EM lighting cabling running up the riser but it only happens in the middle? 

 

Weird!

 

Any ideas? 

 

 

 

 

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Edited by Blue Duck
Why do you keep asking me! 🌭

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Evans Electric

In those conduits , do you think they could have run ...say...  the  lives  in  two of them   and  three neutrals in the third one  ...resurrecting  your friend and mine ...Eddy Currents?  

 

Sometimes Leccy just hums  ,  

 

Porn & Dunwoody lifts  Eh!   Thats a new one    

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Blue Duck

Those are the feeds to the flats, 7/.044(?) Rubbery T&E

 

There is a distinct lack of earthing at the distribution point to the flats fortunately the one I'm working on has a connection to earth. 

 

:D

 

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Evans Electric

Ah  right !   I thought the conduits were feeding the flats  not the rubbery T&Es   .    What are the conduits for  then ?    Floor heating ...off peak s   ??   

 

Back later . Don't hang up . 

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Blue Duck

The rubbery T&E's are going through the conduits.

 

Also possibly a feed to the lift room on the roof? 

 

No UFH or E7.

 

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Evans Electric

Sorry  , wrong end of the stick ,   twin & Es up the conduits  so no visit from friend Eddy and his Currents then .   

 

Its obviously  supernatural then or an alien visitation . :innocent     In other words I don't have a scooby . 

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Rob.

Neon lights anywhere? 

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Blue Duck

No neon lights as far as I know.

 

Was there again today, no noise, no tennant either so I can only assume that something in the flat!

 

Odd...

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binky

porn star with big sex toy???

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Onoff

Used to do some work in an animal feed mill where they kept all the conduits under positive pressure to keep the flour dust out.

That "whistled"...

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