I have heard Mike state before that you should bond everything above the ground and bond everything below ground and connect together at one location only.
bonding garage door rail?
- Thread starter WSB123
- Start date
- Status
I have heard Mike state before that you should bond everything above the ground and bond everything below ground and connect together at one location only.
Yes. It is the same component The board inside the garage opener is getting fried.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
Has voltage and stability of the incoming voltage been checked? Is the EGC in the supply circuit in good condition?
Daniel malack
Senior Member
- Location
- Amissville, Virginia USA
Is their a whole house surge protector on main panel?
Sent from my SM-T350 using Tapatalk
GeorgeB
ElectroHydraulics engineer (retired)
- Location
- Greenville SC
- Occupation
- Retired
I'm going out on a limb here on this. It sounds lots like an intermittent loss of (GEC/neutral/noodle) on a multi-wire branch circuit putting 240 on what should be 120. At least a quick check of the panel and identifying the breaker to check if possible would be smart.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
That is what I have been trying to hint at. May not be seeing full 240 volts but certainly could be seeing 150-180 pretty easily depending on resistance of this plus whatever other load may be involved.
If it is a problem with service or a feeder, you would think there would be similar issues with other items in the house. If problem on just one MWBC, the other item(s) effected may not be so obvious.
If it were a lightning problem it would probably be a one time thing, also good chance it effects other items in the house.
hbiss
EC, Westchester, New York NEC: 2014
- Location
- Hawthorne, New York NEC: 2014
- Occupation
- EC
But again, we are not hearing the whole story about this garage like where it is located in relation to the house and service, length and number of the branch circuits or feeder, subpanel, how run, etc. Is there any other metallic path to the garage like water, phone or cable? Any of these could have a bearing on the problem.
-Hal
-Hal
Daniel malack
Senior Member
- Location
- Amissville, Virginia USA
Have you heard lightning never strikes the same place twice, it's bullish,
Sent from my SM-T350 using Tapatalk
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
I don't believe that it wouldn't ever strike the same place twice. But do find it hard to believe it strikes same place multiple times but only damage is on a circuit board in an appliance, unless that is the only appliance in the facility that can be damaged in this manner.
Surge incoming via one of the circuit conductors would be seeking ground, if EGC of the branch circuit is intact that should be less impedance then via GDO frame, then to the door via a traveling (not so solidly bonded) component, through any metal frame of the door then again through not so solidly bonded rollers - to the door track - and then through not so solidly bonded connection between track and the concrete floor. If there is enough energy surge to push through all that -there is probably more then just a damaged circuit board and signs of arcing around those parts that are not so solidly bonded together.
petersonra
Senior Member
- Location
- Northern illinois
- Occupation
- engineer
what code provision would ban it?
take a look at 250.32. This is one place where you are required to install a GE but are prohibited from bonding it to the service GES.
- Status