Ilya

Aluminum enclosure for PSU - how to connect PE?
« on: May 22, 2020, 05:58:19 AM »
I'm looking at this Hammond enclosure for PSU:
https://www2.mouser.com/ProductDetail/546-1455N1601

I know that per safety regulations the metal enclosure should be bonded to PE. This particular enclosure consists of 4 anodised aluminum pieces: 2 side covers, U-shaped channel and a lid.
My main question is how do I reliably bond all these pieces to PE? Side covers will have some cut-outs, so I can attach bonding wires to one of the screws - this is an easy part.
However, I don't think that I can rely on the connection between side lids and an U-channel. And top cover doesn't have any screws at all.

So how would you go about this? Are there any ways to bond this type of chassis to PE properly?
PCBs, enclosures and build guides at www.rackneve.com


abbey road d enfer

Re: Aluminum enclosure for PSU - how to connect PE?
« Reply #1 on: May 22, 2020, 01:05:31 PM »
I'm looking at this Hammond enclosure for PSU:
https://www2.mouser.com/ProductDetail/546-1455N1601

I know that per safety regulations the metal enclosure should be bonded to PE. This particular enclosure consists of 4 anodised aluminum pieces: 2 side covers, U-shaped channel and a lid.
My main question is how do I reliably bond all these pieces to PE? Side covers will have some cut-outs, so I can attach bonding wires to one of the screws - this is an easy part.
However, I don't think that I can rely on the connection between side lids and an U-channel. And top cover doesn't have any screws at all.

So how would you go about this? Are there any ways to bond this type of chassis to PE properly?
I would have a look at these
https://www.hammfg.com/electronics/small-case/extruded/1457-emi
or
https://www.hammfg.com/electronics/small-case/extruded/1455nhd
They have electric continuity between all faces.
Who's right or wrong is irrelevant. What matters is what's right or wrong.
Star ground is for electricians.

Ilya

Re: Aluminum enclosure for PSU - how to connect PE?
« Reply #2 on: May 22, 2020, 01:25:28 PM »
I would have a look at these
https://www.hammfg.com/electronics/small-case/extruded/1457-emi
or
https://www.hammfg.com/electronics/small-case/extruded/1455nhd
They have electric continuity between all faces.

Thanks. The first one is almost 2 times more expensive, so it's a no-go for now. The second - I still can't see how the lid is connected to other faces....

But you got me thinking in the right direction, I suppose. I believe this case should be suitable:
https://www.hammfg.com/electronics/small-case/extruded/sink-box

What's your oppinion on that?
PCBs, enclosures and build guides at www.rackneve.com

mjrippe

Re: Aluminum enclosure for PSU - how to connect PE?
« Reply #3 on: May 22, 2020, 02:17:02 PM »
If you don't have a bag (or two) of these, here are two sources with part numbers.  ;)

Ilya

Re: Aluminum enclosure for PSU - how to connect PE?
« Reply #4 on: May 22, 2020, 02:20:10 PM »
If you don't have a bag (or two) of these, here are two sources with part numbers.  ;)
Thanks! I have plenty of  these washers. They are super useful.
PCBs, enclosures and build guides at www.rackneve.com


 

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