As Reviewed by Mike Holt
Articles 215 through 220
The following text is a quick summary of the proposed changes for the 2005 NEC. This document is a work in progress and the Code panel will change many over the next few months. Some of these you might find important to your work and you might want to follow their progress with me. Therefore, each week I will email you a few of these changes.
Each proposed change has a Report on Proposal (ROP) number, like 1-25. This number reflects the Proposal Number and all action on this proposal can be viewed in the following PDF document NECPart1 [4.72 MB].
As always, I am looking to improve our products, so if you feel you have anything to contribute, please let me know at Mike@MikeHolt.com.
Article 215 Feeders
Author's Comment: Load calculations often result in a grounded (neutral) conductor that is very small in comparison with the required equipment grounding (bonding) conductor. Should a fault occur from a phase to a grounded (neutral) conductor, the grounded (neutral) conductor could be damaged before the overcurrent protection device opens.
Author's Comment: The text parallels the requirements for branch circuits as contained in 210.5(C).
Author's Comment: The new table should prove to be a useful tool for those who perform electrical load calculations per the NEC.
IV. Optional Feeder and Service Load Calculations
Author's Comment: This is because the 2002 calculation resulted in a larger service size for a heat pump installation, when in reality the consumption was less.
II. More Than One Building or Other Structure
225.30 Number of Supplies.
Author's Comment: A redundant system is not defined, but it might be an electrical system which supplies electrical power to one or more branch circuits which are also connected to another electrical system that supplies the primary electrical power to those branch circuits.
Copyright © 2002 Mike Holt Enterprises,Inc.