2 cable lugs stacked on a single "busbar" (switch-disconnector terminal)

[silverstone]

Hi,

I am considering connecting 2 cable lugs for each polarity at the Switch Disconnector (one at the "front" of the terminal/busbar, 1 at the "back" of the terminal/busbar). Bolt size is M10.

I have ABB OT400E03 Switch-Disconnector for my Battery


I also have WAGO 285-1185 for use with temporary connections as well as precharge circuit:


I was thinking of going from inverter terminal to ABB Switch-Disconnector with one cable, then put another cable going from the same point of the Switch-Disconnector to the WAGO terminal. Instead of letting ALL the current flow through the WAGO terminals during normal operation.

Is there some issue, mechanically, in having 2 lugs on opposite sides of the same busbar/terminal ?

I assume that 1 bolt + 1 flat washer DIN 9021 + cable lug 1 + busbar/terminal + cable lug 2 + flat washer DIN 9021 + conical washer DIN 6796 / Belleville + Nut as usual should do the job alright. Or is another DIN 6796 / Belleville Conical Washer on the other cable lug also needed ?

Or is this a bad practice in general ?

Thank you for your help

 

[rhino]

I don't see issue with doing that. It is common and even recommended in many cases to attach multiple lugs to same connector on a busbar for instance. Only issue would be if something specifically says it is rated for only 1.

 

[timselectric]

Stacking no more than two lugs is acceptable.
Two lugs on opposite sides of a bus is better than stacking them on the same side.

 

[silverstone]

Stacking no more than two lugs is acceptable.
Two lugs on opposite sides of a bus is better than stacking them on the same side.

And we agree, the front and back lug are turned 180° one with respect to the other, right ?
In that way there is some space between the cables so that they don't collide with each other.

One or two conical / Belleville washers though ?

 

[timselectric]

And we agree, the front and back lug are turned 180° one with respect to the other, right ?
In that way there is some space between the cables so that they don't collide with each other.

Yes

One or two conical / Belleville washers though ?

One is enough.
But two doesn't hurt.