70mm2 Crimping terminal

[bendesa]

Hi all,

I have a more general electrical question.

We have an 100KW inverter that needs to be connected to the grid. It needs to be done with 70mm2 cables for each phase plus neutral. To do so we.need to crimp a 70mm2 crimp terminal to crimp to the cable. What if the hole of the crimping terminal is to small to get it over the connection terminal in the inverter?

Should you use an other terminal or can you make the hole bigger by drilling with a electrical drill and make the hole bigger.

Is it totally wrong to make the hole bigger or will it be ok?

Curious to your answers

Many thanks

 

[bendesa]

 

[Besoeker3]

Hi all,

I have a more general electrical question.

We have an 100KW inverter that needs to be connected to the grid. It needs to be done with 70mm2 cables for each phase plus neutral. To do so we.need to crimp a 70mm2 crimp terminal to crimp to the cable. What if the hole of the crimping terminal is to small to get it over the connection terminal in the inverter?

Should you use an other terminal or can you make the hole bigger by drilling with a electrical drill and make the hole bigger.

Is it totally wrong to make the hole bigger or will it be ok?

Curious to your answers

Many thanks

Out of interest what supply voltage are you using? For those conductors we use 400Vac. And I'm a Brit.

 

[Rick 0920]

In the past, I have drilled out the hole larger when needed. I think the proper and safest way to handle this would be to contact the manufacturer and talk to tech support and get them to tell you if you can do this. The terminal is listed for the size of the hole in which it was made. There might be a certain amount that you can drill out and not cause a problem.

 

[Jraef]

In THEORY, you are removing metal that should have been making surface contact with the tang of whatever you are connecting to, as well as reducing the cross sectional area of the lug, which is what determines the amp rating. What I have done is to look up the lug from the same manufacturer that has the correct size hole, to see if the dimensions of the lug change for the size hole I need. In practice, I have yet to find one that did, so like most people, I have drilled them out.