Would you suggest flex for fixed wiring on an EICR is a C3? The client has basically run flex from one socket to a surface socket (i.e. a glorified extension lead). However I would say this is fixed wiring.
What does 521.9.1 mean where it states "only where the the relevant provisions of the regulations are met"? Does this mean CCC, installation method, overload protection etc.
Went on a bit this post but in my opinion if someone has mounted a back box and socket front to a wall wired it in flex but has fitted a PLUG to the end of it this is just an extension lead as it can be disconnected by removing the plug rendering the socket dead.
The second one sounds like the OP may of meant wired into the back of a socket in which case this would be deemed dangerous as it is wired in 1.5mm flex acting as a spur but will have no means of isolation or protection in the event of a fault as it has been hardwired into the back of a socket which is part of the fixed wiring of the house and will more than likely be connected to a 32 amp cb rendering the 1.5mm flex unsuitable and the weakest link.
If that is the case it would be automatically disconnected and the owner would be told why.
Went on a bit this post but in my opinion if someone has mounted a back box and socket front to a wall wired it in flex but has fitted a PLUG to the end of it this is just an extension lead as it can be disconnected by removing the plug rendering the socket dead.
The second one sounds like the OP may of meant wired into the back of a socket in which case this would be deemed dangerous as it is wired in 1.5mm flex acting as a spur but will have no means of isolation or protection in the event of a fault as it has been hardwired into the back of a socket which is part of the fixed wiring of the house and will more than likely be connected to a 32 amp cb rendering the 1.5mm flex unsuitable and the weakest link.
If that is the case it would be automatically disconnected and the owner would be told why.
The second one sounds like the OP may of meant wired into the back of a socket in which case this would be deemed dangerous as it is wired in 1.5mm flex acting as a spur but will have no means of isolation or protection in the event of a fault as it has been hardwired into the back of a socket which is part of the fixed wiring of the house and will more than likely be connected to a 32 amp cb rendering the 1.5mm flex unsuitable and the weakest link.
If that is the case it would be automatically disconnected and the owner would be told why.
Not sure I would be as quick to jump to the term dangerous.
From the brief description the flex runs no more than a metre or two inside the wall.
Overload protection would be provided by the fuse in the plug of whatever is plugged into the socket.
Fault protection - It's worth remembering that the CPC in most 2.5mm T&Es is 1.5mm, the same size as the flex! This is where the adibiatic equation comes in with the relevant values to suit this particular installation. I'm the wrong side of a bottle of gin to be arsed with that right now but I'm fairly certain the flex will be fine.
Hopefully this question will be sufficiently related to the OP`s thread to be allowable:
Please excuse my lack of the correct Electrical terminology - some of You will know that I am a Heating Engineer, Plumber & Gas Engineer - not an Electrician.
With regard to Flex cable being used for `Fixed Wiring` - I think that I know that it is NOT allowed by the Electrical Regulations - certainly not to be run under floors of in stud walls etc.
However for Years quite a few Heating systems that I have installed where the Boiler had a Pump over-run with the Pump having to be wired to the Boiler and also 4 core cable required `to the Boiler` has had the Boiler supply cable and the Pump cable run [usually from the Cylinder cupboard] in Heat Resistant Flex [`re. connecting to the Boiler`] - by the Electricians that have carried out the Heating Controls wiring.
The Flex would definitely have been run both under floors and within stud walls to get from the Cylinder cupboards to the Boilers.
I have also seen that on Heating systems that were not installed by me - so much so that it seemed to be almost a `universal installation method`.
I have queried this on various occasions - asking whether the Boiler 4 core [inc. Earth] and the Pump 3 core [inc. Earth] should be run from the Cylinder cupboard / Wiring Centre in Flat cable to adjacent the Boiler and then `transition` from Socket boxes to Heat Resistant Flex - exiting through flex entry / exit plates to connect to the Boiler.
I have usually been on friendly terms with the Electricians so there has been no perceived animosity / bad feelings about me asking that.
However this was almost universally rejected by the various Electricians that wired my Heating systems - and those Electricians would have issued Certificates for the whole Property`s Electrical installation including the Heating Controls.
What I described about flat cable being used from the Cylinder cupboard to adjacent the Boiler and then transitioning to Heat Resistant Flex was done by at least one of the Electricians over the Years and He stated that I was correct to expect that the Heating Controls wiring was installed in that way.
Sorry for the long preamble - my question is:
If as I suspect what I described about the Fixed wiring is the correct way / the only correct way [?] why would at least 6 or 7 Electricians use Flex without any hesitation [and after being asked about it by me] for the `fixed wiring` section of the Heating System Controls - knowing that they had to Certify the whole Electrical Installation - usually a complete Re-wire & Consumer Unit and the Heating controls - ?
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