Feeding a parallel panel from a disconnect?


Old 12-20-18, 08:45 AM
Thread Starter
Join Date: Dec 2018
Posts: 1
Received 0 Votes on 0 Posts
Feeding a parallel panel from a disconnect?

Good day, this is my first post to this forumn and hopefully, I'll find the answer I need here.

I have 200 amp service coming into my garage through a Siemens JN-324 200 amp fused disconnect switch and then continuing into my home where the 200 amp breaker box is located. I would like to come off of both branches of the discount switch to feed a smaller panel for my garage. The panel will feed a welder and compressor. I know that I can feed a sub box from the main box inside but I do not want the hassle. The disconnect switch says "suitable for use as service equipment and has 200 amp buss fuses on each branch. Am I allowed to add a double lug off of each branch and feed a second box parraleel to the main? I am looking for a cheaper alternative to installing a full 200 amp panel in the garage and feeding the main as a sub or feeding a sub in the garage from the main.

Old 12-20-18, 12:05 PM
Forum Topic Moderator
Join Date: Feb 2005
Location: Near Lansing, Michigan
Posts: 10,943
Received 44 Votes on 42 Posts
Are the existing feeds three wires or four? Where is the GEC -- bare copper wire that ground to the earth via ground rods or water main?
Old 12-20-18, 04:53 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 60,742
Received 1,318 Votes on 1,218 Posts
Welcome to the forums.

Pictures of the inside of the panel/disconnect you want to tap into would be very helpful.
Old 12-25-18, 06:01 AM
Join Date: Mar 2010
Location: USA
Posts: 4,280
Received 109 Votes on 101 Posts
Note: The " Siemens JN-324 200 amp fused disconnect" being the first whole house disconnect means, counts as your service panel or "main panel." Both your basement panel and the new garage panel are considered subpanels and need to be (have been) fed with 4 conductor cable for hot, hot, neutral, and ground.

The grounding electrode conductors for your house come out of the box with that Siemens disconnect to go to ground rods, etc.

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: