meter can bonding

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nolabama

nolabama

Senior Member
Location
new orleans la
i bought a new book today :smile:
electrical grounding and bonding
2cd edition
by j. philip simmons

nice book - plenty of pics, so thats good :smile:

well.... the more i learn the less i know
when making the connection to earth - the grounding conductor at the service do you ? catch the bonded with grounded bar in panel then bond bushing for nipple to meter then the little lug on the load side of grounded in meter or.... something else
 
"the grounding conductor "????? notice in the book the importance of terminology... if you are refering to the grounding electrode conductor (Grounding Electrode Conductor. A conductor used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding electrode system.) then 250.24 states:1) General. The grounding electrode conductor connection shall be made at any accessible point from the load end of the service drop or service lateral to and including the terminal or bus to which the grounded service conductor is connected at the service disconnecting means.
 
sorry sorry sorry - yes i am referring to the grounding electrode conductor - the connection to the earth - the bare wire that is mechanicaly connected to a ground rod driven into the ground, with a hammer, in the rain, late, on a friday, with no lunch ....:grin:
 
so i am asking about the grounding electrode conductor - what ends up in the dirt - you make it up in the meter can, bonding bushing on the nipple and the panel's ground bar right
 
nolabama said:
so i am asking about the grounding electrode conductor - what ends up in the dirt - you make it up in the meter can, bonding bushing on the nipple and the panel's ground bar right
Click to expand...

That could be correct if the GEC is the correct size for the bonding bushing. What size wire is the GEC and what size do you need on the grounding bushing?
 
nolabama said:
so i am asking about the grounding electrode conductor - what ends up in the dirt - you make it up in the meter can, bonding bushing on the nipple and the panel's ground bar right
Click to expand...
The meter connection may be prohibited by your POCO or locality ordinances.
 
augie47 said:
"the grounding conductor "????? notice in the book the importance of terminology... if you are refering to the grounding electrode conductor (Grounding Electrode Conductor. A conductor used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding electrode system.) then 250.24 states:1) General. The grounding electrode conductor connection shall be made at any accessible point from the load end of the service drop or service lateral to and including the terminal or bus to which the grounded service conductor is connected at the service disconnecting means.
Click to expand...

ok thats what i do when i build em -

Quote:
Originally Posted by nolabama
what happens if you run it into both?

I believe you would create a parallel neutral.

so i create a parallel neutral with 250.24? or do i have my terminology messed up

the reason i ask is that this book does not show the grounding electrode conductor ever going further than the bonding nipple - it shows the GEC not entering the meter can and i thought maybe i was doing something wrong
 
You really should look closlely at 250.24 as it spells out the options on the connections of the grounding electrode conductor. In general, it makes a direct (or almost direct) connection to the grounded conductor.
For the grounding electrode to perform its job, the path needs to be direct. If it stopped at the nipple, the fault path would probably be thru the metal enclosure itself and that is insufficient by Code.
 
??

??

I might be way off base on this but here go?s the utility provides 2 phase conductors and a grounded conductor, the phase conductors and grounded conductor are terminated in the meter the customer provides a connectin to the load side of the meter and in the center a connection to the grounded conductor, from there to the panel in the home there are again two phase conductors and a grounded conductor, when you enter the panel you terminate the two phase conductors on the line side of the main circuit breaker and the grounded conductor to the neutral bar, and attach the bonding screw supplied with the panel (green screw secured adjacent to the neutral lug) an equipment ground (bare) conductor is connected to the neutral bar and routed to the ground bars located adjacent to the service entrance and bonded to the ground bar? I have also seen the ground wire under the same lug as the neutral at the panelboard location. Does this sound correct or am I all wet?
 
If you are installing the conductor from the ground rod to ... to supplement 250.53(D)(2), it is not required to be a GEC. It can be a bonding jumper.

This "bonding jumper" can be bonded to the:

1. GEC
2. grounded service-entrance conductor
3. nonflexible grounded service raceway
or
4. any grounded service enclosure.

There is a lot of flexibility in this sub-section number [250.53(D)(2)], that it will make this easy to install.

You can if you choose, install the conductor back to the other locations mentioned in 250.24(D), but then it will be considered a GEC and have to follow those requirements.
 
Pierre C Belarge said:
If you are installing the conductor from the ground rod to ... to supplement 250.53(D)(2), it is not required to be a GEC. It can be a bonding jumper.

This "bonding jumper" can be bonded to the:

1. GEC
2. grounded service-entrance conductor
3. nonflexible grounded service raceway
or
4. any grounded service enclosure.

There is a lot of flexibility in this sub-section number [250.53(D)(2)], that it will make this easy to install.

You can if you choose, install the conductor back to the other locations mentioned in 250.24(D), but then it will be considered a GEC and have to follow those requirements.
Click to expand...


Wouldn't a conductor from the electrode to the neutral actually be a GEC and not a bonding jumper?
 
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