IET
Decrease font size
Increase font size
Topic Title: Extending earth bonding
Topic Summary:
Created On: 19 April 2017 01:04 PM
Status: Read Only
Linear : Threading : Single : Branch
 Extending earth bonding   - goldenboy1818 - 19 April 2017 01:04 PM  
 Extending earth bonding   - dustydazzler - 19 April 2017 01:32 PM  
 Extending earth bonding   - geoffsd - 19 April 2017 01:41 PM  
 Extending earth bonding   - weirdbeard - 20 April 2017 06:53 PM  
 Extending earth bonding   - mapj1 - 19 April 2017 02:08 PM  
 Extending earth bonding   - John Peckham - 19 April 2017 04:41 PM  
 Extending earth bonding   - geoffsd - 19 April 2017 05:03 PM  
 Extending earth bonding   - geoffsd - 19 April 2017 06:52 PM  
 Extending earth bonding   - mapj1 - 20 April 2017 12:25 AM  
 Extending earth bonding   - geoffsd - 20 April 2017 01:04 AM  
 Extending earth bonding   - spinlondon - 19 April 2017 09:22 PM  
 Extending earth bonding   - AJJewsbury - 19 April 2017 10:11 PM  
 Extending earth bonding   - mapj1 - 20 April 2017 01:38 AM  
 Extending earth bonding   - geoffsd - 20 April 2017 05:17 PM  
 Extending earth bonding   - geoffsd - 20 April 2017 07:07 PM  
 Extending earth bonding   - weirdbeard - 20 April 2017 07:22 PM  
 Extending earth bonding   - geoffsd - 20 April 2017 07:28 PM  
Search Topic Search Topic
Topic Tools Topic Tools
View similar topics View similar topics
View topic in raw text format. Print this topic.
 20 April 2017 12:25 AM
User is offline View Users Profile Print this message



mapj1

Posts: 12039
Joined: 22 July 2004

Originally posted by: geoffsd

I have found this in the same part of BS7430;



"The bonding connections to the water and gas pipes

should be made as near as possible to their point of

entry into the premises. If there is an insulating

section or insert at that point, the bonding

connection should be made to the metallic pipes on

the consumer's side of the section or insert."




Same poor practice as 544.1.2



It continues:



"The main equipotential bonding connections to the

main water pipes should normally be on the

consumer's side of the stop tap"




Why?



"but connection on the

Water Authority's side of the stop tap is acceptable,

as long as there is satisfactory electrical continuity

across the tap
."




It doesn't inspire confidence, does it?





Edit - From 1998 edition.


Note of course that for buildings on PME supplies

ENA Engineering Recommendation G12 Issue 4
actually recommends such an insulating break for both gas pipes coming in on page 16, and outside taps going out on page 28.
I can't help wondering if in such cases, ditching the pretence of equipotential bonding to the stuff outdoors altogether, and just calling it earthing of the indoor piping, might be better.

-------------------------
regards Mike
Statistics

New here?

  • To participate in discussions, please log in and introduce yourself.

See Also:



FuseTalk Standard Edition v3.2 - © 1999-2022 FuseTalk Inc. All rights reserved.

 
..