Heater Design

Please send data sheets, specifications, complete schematic and detailed photographs.

Your question is completely without intelligence.

Hi Ian,

What level of intelligence is required to ask you a question? Or is it a matter of not having enough intelligence to see the implications?

Thanks anyway.

I think that the heater manufacturer expects a qualified person to install this heater. The installer is the only one that can assure a safe installation. This is part of the expense of having an electrician's license.

"Being careful not to pinch wires" is a fair comment.
It doesn't imply poor design as it is hard to envisage a design that is entirely proof against having wires pinched and yet is a secure tamper proof cover.
There is always some fool who could leave 2' of wire between the cable clamp/gland and terminals, and then try to stuff the excess into the box. In fact sometimes it's good to have some excess to allow good access.

It's probably just them covering their backsides. There is probably a note saying "don't use this heater in the bath" or "not suitable for chocking commercial airliner wheels"
Del

Hi Del,

What if the so called cover is not just a cover but also is fitted with components carrying 10 ampere at 600V ? The nature of the design is such that the installer is compelled to open the electrical box cover which mounts those power components. To facilitate this excess lengths of wires are provided. The caution is about these wires. If not extremely careful, there is good chance of having one or more wires getting pinched.

Thanks,

Job.

Turn off the power before opening the terminal box. After working on the heater, test the wiring for unwanted grounds before energizing it.

Hi Tornado,

The discussion is about an instruction for installation. Obviously, the power supply is not hooked up to the hater. We are talking about the wording "Do a final --- pinch any wires". If the design is sound and if there is no possibility of the wire getting pinched, what is the necessity of having such a caution?

What discussion? The instructions identify a plausible assembly error for the qualified assembler. You do not grasp this simple concept so you are not a qualified assembler. You're making a mountain out of a mole hill. Hire somebody qualified before you kill somebody.

Instead of playing cat and mouse with Del, why didn't you just give the brand and model of the heater, instead of playing this silly game?

And #6,

The forum only knows the pittance of information you have offered, and none of that information is useful.

Did you understand the instructions??? Apparently not!

<us>

Yeah, you can keep adding 'what ifs' that weren't in the original post all you like.
My Mother in Law used to argue like that.
As soon as you solve one problem, she'd invent another...
What if you just do the job properly? If the person doing it isn't competent they shouldn't do it, and anyhow if the power is all correctly fused/protected a trapped wire should just blow a fuse or a trip.
Yeah... but what if they try and connect it while the power is on?
What if they are doing it and an un-chocked airline rolls through the wall and kills everyone?

What if giant alien goldfish invade?
What if I unsubscribe to avoid any impending disaster?!

Del

I'd say the design is flawed if the wiring is so easily pinched by installing the covers...now on the other hand if the terminal box looked like this....

....then the advice would probably be warranted....

Thank you Solar Eagle.

Job thykkoottathil.

I believe your instructions also stated "For installation by qualified personnel only", I do hope that you have heeded that also, 600 Volts is much more unforgiving than 120/240 Volt household service.

del said "What if giant alien goldfish invade?"

in that case we go to the pet food store and buy alien giant goldfish food

The design engineer or if the installer has purchased the heater himself and assumed the designers role has a duty of care to make sure the heater is suitable for the environment/application. Installed to the manufacturers recommendations as regards distance away from surfaces etc things should be ok. It is up to you to ensure the heater is suitable for the area you install it in. Suggest you don't put one of the multibar fires with the coal effect in a bathroom. You probably don't want a convector heater in an area where flammable gases are present - lets say on a filling station forecourt.

If you have engineered or purchased the heater the duty of care falls on you. Making sure the wires aren't pinched is reasonable. Now check for distances away from flammable surfaces such as wood. How close to the ceiling is it .... etc