Discuss Shower tripping mcb after being used in the Electrical Forum area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:   American Electrical Advice Forum

Matters not. I am not saying up the breaker.....but if you do up it, the cable should also be upped accordingly for cable protection. That protection is needed, even though you are not varying the load. Just regulation, that's all.
The regulations specifically allow omission of fault protection where the circuit is not expected to be able to carry overload current so you can have a situation where say a fixed load is 46 amps the ccc of the cable is 48 amps but your ocpd is 50 amps provided fault protection is afforded as required by section 434

The formula for the tabulated current becomes Ib/correction factors rather than In/
 
Last edited:
The regulations specifically allow omission of fault overload protection where the circuit is not expected to be able to carry overload current so you can have a situation where say a fixed load is 46 amps the ccc of the cable is 48 amps but your ocpd is 50 amps provided fault protection is afforded as required by section 434

The formula for the tabulated current becomes Ib/correction factors rather than In/

corrected that for you.no charge. otherwise i agree, as long as the Iz > Ib.
 
Matters not. I am not saying up the breaker.....but if you do up it, the cable should also be upped accordingly for cable protection. That protection is needed, even though you are not varying the load. Just regulation, that's all.
OK then. The circuit is in place, whose to say the load won't be increased in the future?
 
OK then. The circuit is in place, whose to say the load won't be increased in the future?

That's not how you design a circuit though. After all the shower could be removed and a new sub CU installed at the end of the cable if the use for the room changes.

If the load changes, the circuit design changes and protection and cable size should be altered to suit.
 

Reply to Shower tripping mcb after being used in the Electrical Forum area at ElectriciansForums.net

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

Electrical Forum

Welcome to the Electrical Forum at ElectriciansForums.net. The friendliest electrical forum online. General electrical questions and answers can be found in the electrical forum.
This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock