I am installing a new ring main into part of a basement in my house . The ring main will be connected to its own MCB.
I am wanting to use t&e for the main runs, which will be in the ceiling void, but use round conduit for the drops to the various 2G sockets. The drops are only 32" in length but each will carry the two 2.5mm^2 t&e of the ring.
The reason is beacuse the walls are not uniform and flat, and clipping t&e would look very untidy and would not give adequate cable support.
Following the guidance from earlier posts, I am concerned of the conduit de-rating factor so thought it sensible to bare back the sheaving of the t&e for the drops.
I cannot use conduit and singles throughout, i.e. a complete conduit installation, as the ceiling void restricts its use due to the nature of original building construction.
So, my question?:
Is it sensible to bare back the sheaving for just the drops and if so how do I make the step from singles to t&e at the open end? Do I need some 'special' termination box or is it ok to gunk the open end with silicone sealer etc?
I appreciate that any conduit system should be protected against the ingress of solids and moisture so the quation, I suppose, would apply to whether is was t&e in the drops or bared back t&e singles.
thanks ...Achillies
I am wanting to use t&e for the main runs, which will be in the ceiling void, but use round conduit for the drops to the various 2G sockets. The drops are only 32" in length but each will carry the two 2.5mm^2 t&e of the ring.
The reason is beacuse the walls are not uniform and flat, and clipping t&e would look very untidy and would not give adequate cable support.
Following the guidance from earlier posts, I am concerned of the conduit de-rating factor so thought it sensible to bare back the sheaving of the t&e for the drops.
I cannot use conduit and singles throughout, i.e. a complete conduit installation, as the ceiling void restricts its use due to the nature of original building construction.
So, my question?:
Is it sensible to bare back the sheaving for just the drops and if so how do I make the step from singles to t&e at the open end? Do I need some 'special' termination box or is it ok to gunk the open end with silicone sealer etc?
I appreciate that any conduit system should be protected against the ingress of solids and moisture so the quation, I suppose, would apply to whether is was t&e in the drops or bared back t&e singles.
thanks ...Achillies