Electric shower pull switch isolator

[Pete999]

Still wondering what Charlie,s points were ?

Still wondering what Charlie,s points were ?

Whilst I don't want to steal Charlie's thunder, but the point he is making is a valid one, the higher the KW of the shower the bigger the spark should there be a faulty connection, basivc Ohms Law I = P/V 6000/230=26 Amps whereas 9000/230=39Amps
The other points I'll leave to Charlie but I'm sure you get the gist of what Charlie
said cuz I 'm nice like that, shut up TEL.

 

[clematis432]

Whilst I don't want to steal Charlie's thunder, but the point he is making is a valid one, the higher the KW of the shower the bigger the spark should there be a faulty connection, basivc Ohms Law I = P/V 6000/230=26 Amps whereas 9000/230=39Amps
The other points I'll leave to Charlie but I'm sure you get the gist of what Charlie
said cuz I 'm nice like that, shut up TEL.

Yes, but if the switch is rated to take the load, it should be fine ?

 

[Charlie_]

If I went to a job where a shower was up to a 4th isolator in as many years and I knew my previous connections were good then I would also inspect the shower and iland test it for any problems.. especially if the shower is only 25 amps

 

[Charlie_]

You shouldn’t switch them on and off under flc

 

[Pete999]

Yes, but if the switch is rated to take the load, it should be fine ?

You shouldn’t switch them on and off under flc

Agree without conviction

 

[Midwest]

Yes, think that,s a basic, no offence.

No offence taken. But seen a few thermally damaged cables reconnected causing the terminals etc to fail again. Going back to ‘good wood’, includes the cable that feels stiff, not just ‘clean’.

 

[clematis432]

You shouldn’t switch them on and off under flc

You shouldn’t switch them on and off under flc

It was not switched off under flc

 

[clematis432]

If I went to a job where a shower was up to a 4th isolator in as many years and I knew my previous connections were good then I would also inspect the shower and iland test it for any problems.. especially if the shower is only 25 amps

It was "only" 3 isolators, and I don,t know what could cause an isolator to burn out due to something being wrong in the shower unit ? How could that affect the switch contacts ?

 

[Pete999]

It was not switched off under flc

It was "only" 3 isolators, and I don,t know what could cause an isolator to burn out due to something being wrong in the shower unit ? How could that affect the switch contacts ?

Not doubting your sincerity Clem, but how do you know that? if there is a duff connection then contact burnout will occur. Bite the bullet and fit a decent wall isolator

 

[Charlie_]

It was "only" 3 isolators, and I don,t know what could cause an isolator to burn out due to something being wrong in the shower unit ? How could that affect the switch contacts ?

You said you had replaced it 3 times in 4 years??
Inside shower; faulty components, low ir, reverse polarity could all affect the isolator

 

[clematis432]

Not doubting your sincerity Clem, but how do you know that? if there is a duff connection then contact burnout will occur. Bite the bullet and fit a decent wall isolator

Just can,t quite work out Pete, how a duff connection can cause switch contacts to burn out. Surely a bad cable connection would not contribute to excess current going through the switch contacts ? But totally agree a wall mounted isolator is much better than a fiddly pull switch.

You said you had replaced it 3 times in 4 years??
Inside shower; faulty components, low ir, reverse polarity could all affect the isolator

Don,t want to go on and on Charlie about this stupid switch but can,t quite work out/get to grips with how these things would cause an increase in current through the switch contacts(only thing likely to burn out switch) but thanks all for input.

 

[Pete999]

Just can,t quite work out Pete, how a duff connection can cause switch contacts to burn out. Surely a bad cable connection would not contribute to excess current going through the switch contacts ? But totally agree a wall mounted isolator is much better than a fiddly pull switch.

Don,t want to go on and on Charlie about this stupid switch but can,t quite work out/get to grips with how these things would cause an increase in current through the switch contacts(only thing likely to burn out switch) but thanks all for input.

A maintenance spark not knowing what a bad connection can cause Gawd help us

 

[clematis432]

A maintenance spark not knowing what a bad connection can cause Gawd help us
[/QUI

A maintenance spark not knowing what a bad connection can cause Gawd help us

I know very well the damage a bad connection can do, but what it can,t do, is cause an increase of current. Do you know something I don,t ?

 

[clematis432]

I know very well the damage a bad connection can do but what it can,t do, is cause an increase in current. Do you know something I don,t ?

 

[Pete999]

Oh right? but it can cause arching, heat, high resistance joints, therefore burnt contacts, therefore failure, of circuit therefore failure of switch therefore non functioning equipment ergo shower.

 

[clematis432]

Or do you agree with Charlie that things like reversed polarity, low IR, can cause an increase in fault current ?

Oh right? but it can cause arching, heat, high resistance joints, therefore burnt contacts, therefore failure, of circuit therefore failure of switch therefore non functioning equipment ergo shower.

Oh right? but it can cause arching, heat, high resistance joints, therefore burnt contacts, therefore failure, of circuit therefore failure of switch therefore non functioning equipment ergo shower.

Yes it can cause arcing,heat, high resistance joints all right but all this would be at the bad connection not through the switch contacts, where are you actually coming from ?

 

[Charlie_]

So there has been 4 isolators in 4 years..
Your connections in isolators have been ok..
You seem to be happy with the rating of the isolators..
So I would be now checking out the shower..
How do you know for certain they haven’t been switching it on/off under load?
I would test shower element and whatnot

 

[Charlie_]

When did I say those issues would cause an increase in current?

 

[clematis432]

So there has been 4 isolators in 4 years..
Your connections in isolators have been ok..
You seem to be happy with the rating of the isolators..
So I would be now checking out the shower..
How do you know for certain they haven’t been switching it on/off under load?
I would test shower element and whatnot

Check out the shower for what ?

 

[Charlie_]

Is the isolator double pole?
Does it break both poles at the same time?