leeradney
Member
- Location
- Dublin, GA USA
I see that the utility is connecting to both hots, the neutral and the ground from their end. When the 4 wires back to the mobile home are connected, how is the mobile home connecting to the utility ground?
Where is the ground?
- Thread starter leeradney
- Start date
- Status
I see that the utility is connecting to both hots, the neutral and the ground from their end. When the 4 wires back to the mobile home are connected, how is the mobile home connecting to the utility ground?
mwm1752
Senior Member
- Location
- Aspen, Colo
through the grounded conductor in the mast --
leeradney
Member
- Location
- Dublin, GA USA
I think I see what you are saying. But with only three wires going to the outdoor disconnect (the ground goes to earth). Where does the ground leaving the disconnect into the mobile home pick up the ground from the utility, if it simply follows the pole into the ground rod, rather than entering the outdoor disconnect?
Thanks!
Lee
Sierrasparky
Senior Member
- Location
- USA
- Occupation
- Electrician ,contractor
I think what you are thinking or wondering is that the Neutral and the ground are terminated at the same place at the service. From the service to the sub panel they are separated. We separate the to keep current carrying conductors from the grounds t0 keep to potential to or as close to zero and to carry the fault current so as to clear the fault opening the breaker or blowing the fuse.
leeradney
Member
- Location
- Dublin, GA USA
Sierrasparky
Senior Member
- Location
- USA
- Occupation
- Electrician ,contractor
The utility does no supply a ground. It supplies a grounded conductor ( neutral), and the actual ground is created at the service.
mwm1752
Senior Member
- Location
- Aspen, Colo
From what I've seen -- All wood utility poles have a electrode conductor buried around the bottom of the pole that is attached to the length of the pole to the top where the grounded conductor is bonded. this drawing actually shows the ground rod & electrode conductor as being bonded at the top.
jaggedben
Senior Member
- Location
- Northern California
- Occupation
- Solar and Energy Storage Installer
The ground from the mobile home should be bonded to the neutral in the disconnect. The picture is not really showing the wiring of the disconnect, at all, so it's a not a great picture for answering your question. A close up of the disco wiring should show it. The disco must be suitable for use as service equipment and ought to have a provision for bonding the ground.
Take a service 480Y/277V providing a grounded Y config from a Utility's pad trafo secondary.
A, B, C, and N pass to the point of service.
The N will is a grounded conductor from the utility. It has been bonded to Utility's ground.
Now the customer past the point of service will install his own independent ground (ufer, ground rod, etc.).
The N will be bonded to the customer ground at the SES just past the disconnect.
Note: Two distinct and and separate grounds exist.....the Utility's one and the Customer's one.
The customer cannot use the utility's ground to meet his ground requirement.
To do so would violate the needed isolation from lightning, surges, etc.
A, B, C, and N pass to the point of service.
The N will is a grounded conductor from the utility. It has been bonded to Utility's ground.
Now the customer past the point of service will install his own independent ground (ufer, ground rod, etc.).
The N will be bonded to the customer ground at the SES just past the disconnect.
Note: Two distinct and and separate grounds exist.....the Utility's one and the Customer's one.
The customer cannot use the utility's ground to meet his ground requirement.
To do so would violate the needed isolation from lightning, surges, etc.
- Status