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#10260 - 04/01/14 02:00 AM Montgomery Escalator Shocking  
Joined: Sep 2012
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sbrmilitia Offline
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sbrmilitia  Offline
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I have 4 Montgomery escalators that when you touch the metal under the hand rail it shocks you. I've cut the end off a braided shunt and frayed them out to ride inside the handrail and grounded the other end. When the escalator turned off all the metal is reading grounded on the meter. The shunts didn't seem to help. Has anyone ever seen this before?

#10261 - 04/01/14 02:27 AM Re: Montgomery Escalator Shocking [Re: sbrmilitia]  
Joined: Jun 2013
Posts: 72
Postal Offline
journeyman
Postal  Offline
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Posts: 72
Wonder if a little scotch guard would help out

#10262 - 04/01/14 03:19 AM Re: Montgomery Escalator Shocking [Re: Postal]  
Joined: Jan 2014
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Kone D Offline
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Kone D  Offline
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you probably have carpet around units. I had same problem at department stores with carpet. Try to ground to escalator truss then ground truss to earth ground ,should take care of it. you may have to ground both sides of escalator.

#10263 - 04/01/14 06:00 AM Re: Montgomery Escalator Shocking [Re: Kone D]  
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uppo72 Offline
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Most of the time it will be static charge however I did have a funny story having this actually live when touched. Back in the day, we had some old Westinghouse escalators that didn't have any handrail entry switches. Then the regs changed and these had to be fitted. The repairs crew came and installed them then left. About a year later, after the handrail had started to stretch, and started to rub on the conduit supplying the switches with the 125v dc. Of course, it wore away the conduit and insulation on the wiring, and hence made the carbon in the handrail become active. Everyone that got to the top of the thing got a zap!! Funny times!!

#10277 - 04/03/14 01:05 AM Re: Montgomery Escalator Shocking [Re: Kone D]  
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sbrmilitia Offline
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sbrmilitia  Offline
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Originally Posted By: Kone D
you probably have carpet around units. I had same problem at department stores with carpet. Try to ground to escalator truss then ground truss to earth ground ,should take care of it. you may have to ground both sides of escalator.




hit the nail on the head, the down unit has carpet at the top and its the one im getting the complaints about

#10281 - 04/04/14 02:49 AM Re: Montgomery Escalator Shocking [Re: sbrmilitia]  
Joined: Aug 2013
Posts: 116
Elev^te79 Offline
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Elev^te79  Offline
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We use to lay old Otis shunts wire over the handrail then grounded to the truss

#10365 - 04/14/14 12:27 PM Re: Montgomery Escalator Shocking [Re: Elev^te79]  
Joined: Mar 2014
Posts: 144
JustWolf Offline
Liscensed Journeyman
JustWolf  Offline
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Joined: Mar 2014
Posts: 144
Milwaukee
The shunt is the correct thing to use, but it must touch the cover of the handrail not the cloth part. Ive done it plenty of times, always worked.


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