high Voltage conduit tagging?
high Voltage conduit tagging?
(OP)
We have a discussion on how to tag high voltage conduit.
We are doing a new installation of conduit for 4160 volts. We are putting several manholes and one of our engineers, who is doing the design, is assigning conduit tags from manhole to manhole and all the conduit tags are different for one service.
I told him this is unsafe since the electrician may go to the switchgear and said: this is conduit number 1006 and at the other end he wants to find conduit 1006. But he is going to find that the conduit 1006 has changed to conduit 1010.
My boss told me not to "critize" other people design since this is "bidable" and it is not important.
I told them that this is a safety issue and not if this is "bidable" or not.
Can someone tell me if there is an OSHA requirement on this or a California code requirement on this?
I have try to find it with no success.
We are doing a new installation of conduit for 4160 volts. We are putting several manholes and one of our engineers, who is doing the design, is assigning conduit tags from manhole to manhole and all the conduit tags are different for one service.
I told him this is unsafe since the electrician may go to the switchgear and said: this is conduit number 1006 and at the other end he wants to find conduit 1006. But he is going to find that the conduit 1006 has changed to conduit 1010.
My boss told me not to "critize" other people design since this is "bidable" and it is not important.
I told them that this is a safety issue and not if this is "bidable" or not.
Can someone tell me if there is an OSHA requirement on this or a California code requirement on this?
I have try to find it with no success.






RE: high Voltage conduit tagging?
RE: high Voltage conduit tagging?
If you numbered all the conduits the same, then it is difficult to refer to a single one. This might be OK as long as you only had one conduit between manholes, but if you had multiple conduits it would be restrictive.
RE: high Voltage conduit tagging?
RE: high Voltage conduit tagging?
I want to apologize for the misunderstanding. It is as Jghrist is describing. The conduit tag is the same between manholes, but changes when it leave the manhole or does not have any tag in the manholes.The problem arises on the fact that previous contracts the engineers used one conduit tag for the whole conduit run from switchgear 1 to switchgear 2 even though there are several manholes in between. So there has been already four or five consultants that have done the project and follow that rule. But during the installation, we discovered that the contractor may have made some mistake and found different tags at the end of the switchgear.
Instead of correcting it, the engineer decided to continue with the way the contractor has installed the conduit tags, except that there is no tags in the manhole, only at the end of each switchgear. And there is no drawing indicating which conduit is which in the manholes. So in my opinion it will be easy to have the same tag at both side of the siwtchgear, even though it goes through several manholes.
But apparently this is not a safety problem or an OSHA issue, isn't it?.
That is the question.
RE: high Voltage conduit tagging?
RE: high Voltage conduit tagging?
Now that you mention that many contractors & designers worked for the project, there must have been lot of confusion in the Tagging system.
If the problem is only that of tagging you can keep the same Tag no. for the conduit from the starting to the end, but in the manhoples where that conduit is accessible you need to put the same Tag no. In case of multiple conduits if you dont Tag in the manholes you will find difficulty later in identifying the cables.