What type of strain relief do-dah for fixed equipment?

[Cigaro]

Hi all,

I am currently building an amplifier and need to figure out how to get power into the (home-made) case.

The usual method is to use an IEC socket but I don't have the tools and don't trust myself to cut the square hole in the (acrylic) back panel without messing it up, so I want to use a fixed lead.

Can anyone recommend a good cable entry grommet for this purpose that also clamps the cable to provide strain relief? I figured you guys may know as I suspect electricians have to do this kind of thing a lot, or am I way off the mark?

edit: The lead will be a 3-core 0.75mm^2 terminated in a moulded plug at the other end.

Cheers.

 

[Taylortwocities]

Cable Strain Relief

 

[333rocky333]

http://www.ebay.co.uk/sch/i.html?_nkw=cable+strain+relief

 

[Monkeh]

http://www.rapidonline.com/cables-connectors/m16-cord-grip-bush-04-2200

E: These are also pretty nice: http://www.rapidonline.com/cables-connectors/conclamp-cable-gland-type-a-04-0270

 

[Sureitsoff?]

a blue neutrik powercon connector is a better connector than an IEC socket AND only requires a round hole

http://www.google.co.uk/url?url=htt...oQFjAK&usg=AFQjCNG83P0cLnCuZSZt8BvfCjjsupsY9Q

 

[ban-all-sheds]

Can anyone recommend a good cable entry grommet for this purpose that also clamps the cable to provide strain relief?

There was a time when I would have used an ordinary grommet, chosen to be a really tight fit (to stop the flex being easily pushed in), and tied a knot in the flex inside to stop it being pulled out.

a blue neutrik powercon connector is a better connector than an IEC socket AND only requires a round hole

Or a traditional Bulgin connector

 

[JohnW2]

Can anyone recommend a good cable entry grommet for this purpose that also clamps the cable to provide strain relief?

There was a time when I would have used an ordinary grommet, chosen to be a really tight fit (to stop the flex being easily pushed in), and tied a knot in the flex inside to stop it being pulled out.

That time still occasionally exists for me - or, the slightly more decent variant of a big cable tie or 'clamped on collar', rather than the knot.

Kind Regards, John

 

[Sureitsoff?]

you cant tie a knot in rhe cable. it stops the electrons from getting in

 

[ban-all-sheds]

Nonsense, it just means that they have to slow down.

It is a scientific fact that when things slow down they get lighter, and lighter electrons become quicker to respond, there's less delay and less "smear" when they have to change direction. In an amplifier this results in a lower noise floor, extended frequency response, lower THD, better dynamic range and a noticeable improvement in clarity.

I am currently developing a productised cable knot, and when ready I shall look into licensing it to Russ Andrews.

Riches beyond the dreams of avarice beckon, as long as we can find enough mug^H^H^H discerning buyers, which I believe is where his area of expertise lies.

 

[Taylortwocities]

 

[Sureitsoff?]

bas I got halfway through reading your post and thought "flog it to russ andrews" and then you said it!!!

 

[JohnW2]

bas I got halfway through reading your post and thought "flog it to russ andrews" and then you said it!!!

I suspect that the "advertising copy" in the first half of BAS's post was (or could have been) copied/pasted from Mr Andrews' website

Kind Regards, John

 

[Cigaro]

Went for the cheap plastic gland in the end. Works just fine.

Just to finish the damned thing now.

Yes, I am aware I need some heatshrink on those crimp terminals

 

[stillp]

Nonsense, it just means that they have to slow down.

It is a scientific fact that when things slow down they get lighter, and lighter electrons become quicker to respond, there's less delay and less "smear" when they have to change direction. In an amplifier this results in a lower noise floor, extended frequency response, lower THD, better dynamic range and a noticeable improvement in clarity.

I am currently developing a productised cable knot, and when ready I shall look into licensing it to Russ Andrews.

Riches beyond the dreams of avarice beckon, as long as we can find enough mug^H^H^H discerning buyers, which I believe is where his area of expertise lies.

A knot in the cable will block DC, which is straight, so can't cope with the tight bends. AC will be OK if the frequency is high enough.

 

[ban-all-sheds]

I suspect that the "advertising copy" in the first half of BAS's post was (or could have been) copied/pasted from Mr Andrews' website

No and yes.