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Thread: Tap question ??

  1. #1
    Join Date
    Feb 2018
    Location
    US
    Posts
    30

    Tap question ??

    I need to feed two rooftop HVAC units that are 3 phase 460v 20a... There was an existing unit being removed that was the same size and was fed off a 600v 30a fused disco that was tapped off the riser in a trough just before it goes into a transformer. There is zero room for a second tap in the trough and I'm trying to figure out the easiest legal way to add a second disconnect off the single tap. Below is a pic of the existing disco.. My first thought was to remove the disconnect and put a small piece of trough in and then use a Polaris to feed two disconnects but that's still tapping a tap.. Any advice is much appreciated..

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  2. #2
    Join Date
    May 2005
    Location
    Richmond, Virginia
    Posts
    22,246
    How about feeding those conductors to a small 3ph panel fitted with two 3p breakers?
    Code references based on 2005 NEC
    Larry B. Fine
    Master Electrician
    Electrical Contractor
    Richmond, VA

  3. #3
    Join Date
    Feb 2018
    Location
    US
    Posts
    30
    I thought about that also I'm just trying to find a small 480 panel that will fit

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  4. #4
    Join Date
    Feb 2018
    Location
    US
    Posts
    30
    Was thinking a more cost effective way to go would be to replace that dico with a 60a disco and then tap the load side in the bottom of it and feed two 30a disconnects off of it

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