Bobby O
Good to hear from you. Your trolls are always interesting. You always keep the subject sufficently nebulous, one can't always tell the context. For example, I can't tell if you are discussing residential of industrial - and yes it matters.
What is nebulous to you? Isn't it obvious that it is residential?
Starting from there, give some thought to the physics. The grounded service conductor resistance doesn't matter - high or low indifferent.
Why will it not matter? What type of meter is used for Single Phase Three Wire? If the neutral or the grounded service conductor used is of high resistance what could possibly happen on a single line to ground fault on the operation of the OCPD? Can you your physics on why there may be a possibility that the OCPD may not operate?
Your premisis is line to ground (earth) leakage after the meter is a problem (safety or money - can't tell) because the utility intentionally installs a higher than needed resistance service neutral. This is either cheating the customer, or unsafe because the leakage won't trip the unspecified OCP - I can't tell which concerns you.
Both concerns me. There is a probability that DU may cheat and at the same time it will be unsafe on a single line to ground fault in residential, single phase three wire. If you have read the original post, I am asking for the Code that DU is using for service conductors both for the ungrounded service conductor and the grounded service conductor.
Basic Physics:
The resisitance of a line to earth leakage connection will be much higher than any service neutral conductor. Other than gfci, the system is not designed to trip on earth leakage.
And you know this. You have a copy of IEEE green book. So, where are you going?
I want to know what Code is being used by the Distribution Utility to size up their Service Conductors.
Possibly:
The utility is undersizing neutrals in a effort to cheat the customer on metering?
So it seems that you understand. What do you think will be the meter reading if the neutral or the grounded service conductor is not undersized and what do you think will be the reading of the meter if the neutral is properly sized? What Code is the DU using?
The utility is, with forethought and malice, undersizing neutral conductors to prevent customer CBs from tripping on earth faults?
Either is pretty ludicrus. Because: Other than gfci, the system is not designed to trip on earth leakage.
Sorry to hit and run, but I got to get to work. Got a customer that wants to pay.
ice
Why do we have Authorities? Isn't it to make sure that all will be complying? Should Due Diligence be practiced?