Space working requirements

Status
Not open for further replies.
P

Pok3r

Member
Location
Yuma Az united States
061e3dd48ca8a42e1ac6f08bebc8b855.jpg


Any one see something wrong here


Sent from my iPhone using Tapatalk
 
110.26

(A) Working Space. Working space for equipment operating at
1000 volts, nominal, or less to ground and likely to require examination,
adjustment, servicing, or maintenance while energized shall
comply with the dimensions of 110.26(A)(1), (A)(2), (A)(3), and
(A)(4) or as required or permitted elsewhere in this Code.

In my opinion, the 480 volt motor connection points are unlikely to require work while energized.
If I needed to troubleshoot them while energized, it would most likely be done at the controller.
The 24 and 120 volt boxes, I assume are just terminal strips for field connections to the unit.
These are not unlike a junction box in an attic, they probably don't require the working space per 110.26.

that being said, I work for a company that builds skidded equipment and we always do our best to provide ample working space and access.
 
Pok3r said:
Is till good to you?



Sent from my iPhone using Tapatalk
Click to expand...

I think you are trying to make some kind of point but whatever it is escapes me.

In lieu of making us guess what you think might be some kind of code violation why not just tell us what you think is a violation.

I agree with the other poster that working space is not required at the motors for the reasons he gave.

I am less sure about the two small boxes. It is hard for me to tell from the picture how much space is in front of the boxes. It might be 36 inches, but I just can't tell with any certainty one way or the other. I also don't know what is in the boxes so it is hard for me to evaluate whether someone might have to work in there on energized equipment.

ETA: Don't take my comments as endorsing this design. It is a terrible way to design equipment, but bad design choices are not always code violations.

More thoughts: It appears to me that if you installed a platform in front of the motors you could get good access to the junction boxes. It might even meet the working space requirements, if you think that is needed. You might well be able to extend the platform to below the two junction boxes as well, providing access and working space for them too.
 
Last edited:
That looks like it is a manufactured listed package unit so the NEC wouldn't apply.
 
infinity said:
That looks like it is a manufactured listed package unit so the NEC wouldn't apply.
Click to expand...

Manufactured/fabricated indeed, but how do we know it's listed?
We fabricate mostly custom projects for the gas and oil field but none are listed products.
Many of our buildings have to be certified for the state they ship to and are inspected and held to the NEC.
 
Sajid khan said:
Cannot see any grounding bonding for the equipment.
Click to expand...

what would need bonding that isn't already?

there is probably an EGC of some sort feeding each motor.

quite possible there is one going into each box. the connection would likely be inside where it would not show in the picture.

there is no requirement that bonding conductors be external, or that the connections show up in pictures.
 
c63a3676b52ede25c8f81ba57bf0a9d8.jpg
(there is a 4/o bear copper for lighting protection being use and is bounded to one column beam that has a ground about 200' away from that area)... A European company did all this not sure if they fallow NEC regulations.. also is there something for having a bear ground inside a metallic conduit with only white bushing at both ends
 
Pok3r said:
(there is a 4/o bear copper for lighting protection being use and is bounded to one column beam that has a ground about 200' away from that area)... A European company did all this not sure if they fallow NEC regulations.. also is there something for having a bear ground inside a metallic conduit with only white bushing at both ends
Click to expand...

I don't see how the 4/0 Cu EGC serves any real purpose for lightning protection. It does not hurt anything, but I don't see it doing much good either.

As for bonding the conduits, it appears like the skid is effectively bonded by the 4/0 EGC and that the conduit is effectively bonded to the skid. If you see this as insufficient, it would not be real hard to add a bonding conductor to the outside of the conduits.
 
petersonra said:
what would need bonding that isn't already?

there is probably an EGC of some sort feeding each motor.

quite possible there is one going into each box. the connection would likely be inside where it would not show in the picture.

there is no requirement that bonding conductors be external, or that the connections show up in pictures.
Click to expand...
It is there if look closely there is a green conductor tie to the bare conductor on the upper side of the steel structure.. i think this is connected to the base of the equipment but not clealy visible in the picture..

Sent from my GT-I9300I using Tapatalk
 
Is there something saying there is a difference on solid/stranded bear 4/0 copper for grounding of equipment and using light protection 4/0 bear copper wire


Sent from my iPhone using Tapatalk
 
Status
Not open for further replies.
Top