3 Phase Stop Start Switch

[GLENNSPARK]

he Should have left it alone until you came to sort it. I may be wrong here but those wires he left....could any of these have become energised if someone had switched something without realising it?....If thats so then that makes him a dimmer and shouldn`t be sparkying.....correct me if i`m wrong though........

 

[MUFC1999]

he Should have left it alone until you came to sort it. I may be wrong here but those wires he left....could any of these have become energised if someone had switched something without realising it?....If thats so then that makes him a dimmer and shouldn`t be sparkying.....correct me if i`m wrong though........

Everything was left safe and locked off.

 

[GLENNSPARK]

Everything was left safe and locked off.

No probs mate ...I`m not the leccy police (nor wish to be) it just seemed like a potential thats all mate...

 

[Darkwood]

Only other thing to mention is what stop the motor riding up too far and jamming (not in a bob marley sense) or damaging the ramp, is there a physical disconnector of the motor like a 3phase lever switch or is it a limit switch to be tagged into stop circuit, sounds doubtful for the latter as its got 400v control and really should have a lower voltage exporting out to limit but nothing supprises me any more with old dodgy machinery.
So as a recap... we have a contactor Dol with no overload protection a 400 3phase flex to motor missing adequate mechanical protection and uncertainty over the safety system if one exists of the limit switch to halt the motor at full height etc etc ... kinda get a feeling you should leave this well alone with your experience, the minute you make a alteration or replace a major part of the electrics you invariably become responsible the the machine/ramp you commision on completion is safe to use.
Havent even mentioned a E.stop circuit on far posts of ramp in case someone out of sight is in danger :bobby:

 

[Darkwood]

@MUFC1999 dont you get the feeling that what should be a simple contactor change has turned into a Health and Safety nightmare , the problem here is the owners usually operate this gear in the knowledge of its lack of safety and dont often want to pay for a re-hash of the electrics to bring upto date.

Now the question is do you leave after making your repair or do you explain you cant repair it and will need a control system overall to make it safe to use....
One method make you a quick buck but also leaves you open for liability if an accident occurs, the other way you made a risk assessment did your upgrade and walked away with confidence that the operators have the protection required related to the risks involved in working around and using the ramp.

 

[netblindpaul]

This always seems to be an issue with industrial and commercial machinery where STATUTE law applies.
No one seems to question it when you have to upgrade a consumer unit to meet the current regs in a domestic, to comply with 7671, oh & the STATUTE law that is the building regulations.
In terms of "policing" the building regs are much less policed than workplace H&S laws.