Box Knockouts - or not

[BJC]

I bought a large deep aluminium box (194x194x 56) to flush mount some modular switches. The box is an MK 898ALM with 6 32 mm knockouts which don't knockout (unless I'm not hitting them hard enough). I presume there is a standard tool for knocking them out but I've no idea what. Any advice ?

 

[andy]

I bought a large deep aluminium box (194x194x 56) to flush mount some modular switches. The box is an MK 898ALM with 6 32 mm knockouts which don't knockout (unless I'm not hitting them hard enough). I presume there is a standard tool for knocking them out but I've no idea what. Any advice ?

normally the knockouts are partially cut. some you have to hit hard to get them to give way. on some tho thee are marking where they should go and you have to use a holesaw to remove them. altho for the box you have they should just knock out

 

[plugwash]

support the box on either side of the knockout with peices of wood and then hit it from inside with a nail punch until it gives way.

 

[BJC]

The "cutouts" look like inserts and look as though they should be hit on the inside. I tried a few wallaps using a nail punch but I was in danger of buckling the box. I looked at a slightly smaller box (bought in error) and this has the partially cut knockouts with a tab. The big box cutouts don't have a tab. Maybe I'm just being too gentle.

 

[plugwash]

probablly the last metal mk box i did required a *lot* of force.

 

[Lectrician]

The larger MK boxes used on 6/8/9/12 etc grids, have 32mm knockouts that need removing by knocking from inside - no tips really - just bang them out

 

[BJC]

Thanks chaps. I'll go armed with my mash hammer and a big pair of protective gloves. I'll let you kow how I get on.