Electric shower with no fused protection?!

[EFLImpudence]

If it is an old shower the 9.5kW will be the rating at 240V.

Then it wouldn't have a 10.34kW rating, would it?

You work it out - 5.57Ω.


Anyway, new showers are still quoted at 240V.

 

[winston1]

9500w at 230v is 5.57 ohms, but who said the resistance of the shower is 5.57 ohms anyway?
9500w at 240v is 6.06 ohms, perhaps that is the resistance of the shower.

 

[JohnW2]

If it is an old shower the 9.5kW will be the rating at 240V.

As EFLI said, even brand new showers (and most other heat-producing appliances) still have their power quoted at 240V, even now - it makes them sound more powerful and, in any event, I think that most people in the UK probably have a supply closer to 240V than 230V.

However, this one was an exception since, per the OP, it quoted power at both 230v and 240V ("9.5kW - 10.34kW"). If you don't believe it, do the sum:

9.5 x (240/230)² = 10.34.

Kind Regards, John

 

[securespark]

Pulling the fuse is not a terribly effective form of isolation either, since it only breaks the line conductor...

Single pole isolation is no good if you have a TT supply, but acceptable for other supply types.

However...

You're only half right

Because shower switches are generally DP.

 

[stillp]

What size is the cable?

 

[conny]

Pulling the fuse means if a visitor uses the bathroom and pulls the shower cord, either inadvertently or to see what it does, then at least you won't have a live wire hanging around after they forget to pull it again to turn it off.