jar546
Forum Coordinator
How do you connect your transformers?
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XFMR Connection
- Thread starter jar546
- Start date
beach
Gold Member
In what way are you asking?
mark handler
SAWHORSE
raider1
Silver Member
I don't see a grounding electrode conductor and I am having a hard time seeing the system bonding jumper connection.
Chris
Chris
jar546
Forum Coordinator
Yes, me neitherraider1 said:
raider1
Silver Member
I would also wager that the supply side bonding jumper (formally known as the equipment bonding jumper) is not sized properly. It seems quite small.
Chris
Chris
chris kennedy
Sawhorse
raider1 said:
Looks like there is an empty lug on X0 right under X2. Maybe the installer isn't finished yet.:lol:jar546 said:
jar546
Forum Coordinator
A better pic of the XFMR next to it:
beach
Gold Member
I didn't know you had a picture attached...... I can't view any of the pics, only the text. Weird....
raider1
Silver Member
No, system bonding jumper.
No, grounding electrode conductor
The supply side bonding jumper appears to be too small.
Someone needs a lesson in 250.30.
Chris
No, grounding electrode conductor
The supply side bonding jumper appears to be too small.
Someone needs a lesson in 250.30.
Chris
jar546
Forum Coordinator
They ran the neutral from XO directly to the neutral bar of the panel/disco and from there ran a GEC.
There is no bonding jumper from XO to the XFMR frame sized IAW 250.66
There is no bonding jumper from XO to the XFMR frame sized IAW 250.66
BSSTG
Gold Member
That there could smoke the bosses coffee pot. Not a good thing. I did it once!
BS
BS
jar546
Forum Coordinator
Let me paint a better picture.
The system bonding jumper IS from the first disconnect as allowed, HOWEVER, it is useless because the GEC is off the frame of the XFMR.
They are going to remove the system bond from the main disconnect and place it from XO to the XFMR frame ground, then move the initial connection point of the GEC from the XFMR frame to XO where there is a lug waiting for it. Another lug must be added to XO for the system bond jumper.
The system bonding jumper IS from the first disconnect as allowed, HOWEVER, it is useless because the GEC is off the frame of the XFMR.
They are going to remove the system bond from the main disconnect and place it from XO to the XFMR frame ground, then move the initial connection point of the GEC from the XFMR frame to XO where there is a lug waiting for it. Another lug must be added to XO for the system bond jumper.
RJJ
Co-Founder
What are the little smoke marks on the back side of photo #2.
jar546
Forum Coordinator
So I have a question.
Do you see more GEC's connected to the XFMR or to the first disco/panel on the secondary side?
Do you see more GEC's connected to the XFMR or to the first disco/panel on the secondary side?
raider1
Silver Member
Most of the time in my area the grounding and bonding is done at the transformer and not at the first disconnecting means. That is the way I preferred to do it when I was installing.jar546 said:
Chris