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Replace T90XR with T90SR

  • 16-01-2021 1:02am
    #1
    gooner99
    Registered Users, Registered Users 2 Posts: 2,051 ✭✭✭


    I notice the T90xr is rated online as 8.5/9.5kw and the T90sr is rated as 9.0kw. I believe the sr is a direct replacement for the xr and that the plumbing is exactly the same. Is the wiring/cable rating the same also?


Comments

  • #2
    Sleeper12
    Registered Users, Registered Users 2 Posts: 17,156 ✭✭✭✭Sleeper12


    The wiring regulations now require 10mm for 9kw and over. In practice 6mm is OK on 9kw up to 15 metres so long as the cable isn't in or under insulation.

    ESB were using 6mm cable on 9kw when they were installing electric showers that they sold in the old ESB retail outlets.


  • #3
    gooner99
    Registered Users, Registered Users 2 Posts: 2,051 ✭✭✭gooner99


    Thanks for the quick reply.

    House is small. Only 8m in length. So cable will be well under 15m.

    The xr currently installed replaced a t90si about 8 years ago. Electrician installed then with no cable upgrade. I guess the electrical regulation update was since then?

    Will double check that it is 10mm. I believe the easiest way to tell is that the 6mm have a single core earth and the 10mm has a multiwire earth?

    I believe the plumbing on both models is the exact same?


  • #4
    Sleeper12
    Registered Users, Registered Users 2 Posts: 17,156 ✭✭✭✭Sleeper12


    Plumbing is the same. I'd be content with 6mm. If it's 10mm all the better.


  • #5
    gooner99
    Registered Users, Registered Users 2 Posts: 2,051 ✭✭✭gooner99


    Thanks for the replies.

    Shower replaced. Found that the old one had a 09/09 date stamp on it. So I think I made the right call to replace instead of new brushes or possibly a pump.

    Plumbing and electrics identical for the XR and SR (Photo attached).

    Wiring is 6mm. Probably 5m max from fuse board to the isolation switch and 3m max on to the shower. Old XR shower was 8.5kw. New SR shower is 9.0kw.


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