Rank: Forum user 
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Hi
We are looking at ensuring our machiery (e.g. pillar drills, lathes and milling machines) are suitably guarded and have emergency stops in compliance with PUWER. However it has been suggested that we need to comply with PD5304 2014 and EN60204. In particular we should reduce voltage to 24v, this is at a significant cost. Does anybody have any advice/experience of this process?
Regards
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Rank: Forum user
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You are unlikely to get any detailed advice on this subject as people will be reluctant to comment unless they can see what you are refering to.
Just a few points -
PD5304 and EN60204 are guidance documents
PUWER Reg 16 - states e-stops where appropriate
So, you may/or may not need to do what you say anyway - as above it depends on what the situation is, what your assessments say, etc.
I would advise that you call the machine suppliers to start with and see where that leads, do PUWER assessments, and then tackle the risks, don't start by trying to comply with guidance that may have no relevance to your situation.
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 1 user thanked James Robinson for this useful post.
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Rank: Super forum user
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Standard machine tools have well recognised methods of guarding the dagerous parts to comply with PUWER Reg 11.
PD5304 and other standards are a good starting point.
If you Google there are plenty of companies who specialise in retro-fitting guards to machines who can advise further.
What do you mean by reduce to 24v? I assume you mean the power supply to electrical switches/interlocks? Not the main machine motor power supply.
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Rank: Forum user
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Hi Ian
Thannk you for your reply, yes it is the supply to emergency stops/switches/interlocks.
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Rank: Super forum user 
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Originally Posted by: YorkSafety  Hi Ian
Thannk you for your reply, yes it is the supply to emergency stops/switches/interlocks.
OK, you do NOT, I repeat NOT have to drop the supply to 24V for safety circuits. IF you are modifying them to be compliant because your assessment shows that to be required, then you need to comply with, as has been suggested EN 60204-1, which BTW is nothing really to do with guarding. It is everything to do with electrical control systems of machinery. Guarding, you need to refer to EN's 12100, 13855, 13849 if you are electrically interlocking (which will call 60204-1 as needed), 14120, 14119 (interlocks), 13857, & 13850 if you are dealing with e-stops. There may be a few others, but those are to hand because I'm working with them on a report for an airport at the moment. If you want help, PM.
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2 users thanked paul.skyrme for this useful post.
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Rank: Forum user
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Well, i did not get your point clearly. EN 60204-1 it is just a document name and not more. But if i tell about voltage then i would suggest to slightly increase if your system is not working properly but for a very short time so that it cannot damage your machine.
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Rank: Super forum user
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