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I was wondering if anyone can point me to regulations on 2 things: We have electrical works going on tomorrow and our manager says if we put the machinery in stop mode it won't start up. I think there needs to be something more robust than that, in that there should be something physically preventing it from starting, not just a programme. Secondly, a fire exit. Our manager says the fire exit is fine with a mag lock failing to open in the event of an alarm. I don't agree. Surely anything programmable could fail, whereas a physical way of forcing a door open is more suitable. To give some context to this last point, the area the fire exit goes through is high security and there is a concern that having a push to exit compromises the security.
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I found this on maglocks: Other Types of Exits with Alternative Exit Control Systems.While the above mentioned panic and emergency exit solutions are sufficient for the vast majority of buildings, some specialist areas remain, such as high security buildings etc. The following systems describe a range of security locking mechanisms which can be integrated into a fire exit strategy. - Maglocks
A maglock is a large electromagnet, usually fitted to the head of the doorframe, with a corresponding metal plate fitted to the face of door. The maglock holds the door shut using the electromagnetic attraction (pull) between the magnet and the plate. This typically provides a holding force in the region of 3 to 5kN. Maglocks are always fail-unlocked in operation.
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Originally Posted by: rach108  I was wondering if anyone can point me to regulations on 2 things: We have electrical works going on tomorrow and our manager says if we put the machinery in stop mode it won't start up. I think there needs to be something more robust than that, in that there should be something physically preventing it from starting, not just a programme.
OK, what electrical works?
Have you got adequate functional safety on the equipment to ensure that it is a safe intervention?
It is NOT always necessary to LOTO machinery to do minor interventions including some, electrical works. What you need to sort out, is why, shutting the machinery down will prevent it from re-starting, that is just very poor.
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Rank: Super forum user 
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Mag locks
I know for a fact that it is possible for a mag lock to fail therefore leaving a fire exit secured during an alarm activation. It happened at one of our sites. They do not always fail to safe.
We have a mechanical over ride on the inside of all of our maglocked fire doors. (Green box)
Luckily when the mag lock failed and kept the door secured during the alarm activation it was part of a test evacuation so no one was put at risk. However if this had happened during a real emergency it would have created a serious safety issue. In terms of fire safety I definitely would not trust a mag lock system unless it had a mechanical safety over ride.
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 1 user thanked stonecold for this useful post.
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Rank: Super forum user 
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All mag lock doors should have a manual over ride button - I'm surprised that you got anyone to fit it without!
On your other question need more information; What sort of machinery? what sort of electrical works? Do you have an electrical Appointed Person? Do you have a plant isolation policy / procedure?
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Rank: Super forum user 
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If somebody did for any reason start the machine up while the works were going on - what would the consequence be?
If the answer is anything bad then it needs locking off!
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1 user thanked Kate for this useful post.
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Rank: Super forum user
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We have literally hundreds of maglocked doors on escape routes. Many do not failsafe or open on the fire alarm) for security reasons, especially on final exits.
All of the doors - without fail - have a green box override or a frangible dome mortise device (see link). All doors have signage highlighting the location of the override and why/when to use it, and all green box overrides on high traffic routes are tested every two months, with others tested quarterly. This more frequent testing regime is as a control measure as doors do not relesase on the fire alrm and therefore are more critical I would definitely not be happy with any electrically locked door without a suitable override https://www.randrsecurity.com/Emergency-Exit-Dome%20?language=en¤cy=GBP
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With regards to the mag locks there are 2 standards to refer to BS 7273-4:2015 Code of practice for the operation of fire protectin measures- Part 4: Actuation of release mechanisms for doors. The second is BS 5839-1:2017 Fire detection and fire alarm systems for buildings Prt 1: Code of practice for design, installation, commissioning and maintenance of systems in non domestic premises. Chapter 9 Actuation of other fire protection systems or safety facilities. You would need to read 7273 more that the other standard as it lays down the catagory of actuation and which one to select and lists under which conditions the interface with the door release mechanisms is fail safe.
With regard to the electrical issue. the machine should be isolated and locked out from all sources of energy when under maintenance if there is a chance it could start unexpectly or loss of a sysem could cause something to drop or move and placed under Lock Out Tag Out (LOTO). E.g. Hydraulics, Compressed Air, Steam, Gases and Electricity are all sources of energy.
Heat and Cold surfaces, Entrapment, Crushing, Being Drawn in and so forth also need to be considered. Lock it off and tag it ou to be safe. Edited by user 02 August 2018 14:55:31(UTC)
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