Forums
New posts
Search forums
What's new
New posts
New media
New media comments
Latest activity
Media
New media
New comments
Search media
Members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Main Forums
Do-It-Yourself (DIY) Question & Answer Forum
Question about Earthing my data equipment
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Talk Electrician Forum:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="rjp44" data-source="post: 555378" data-attributes="member: 36221"><p>I can't see any electrical safety reason why you would want to run a separate CPC back to the MET and it may even introduce new dangers. Each device in the rack will have it's own adequate earth through the supply lead and, unless they are Class II, will each incidentally export that earth through the case to parts of the metal rack that they touch. This contact won't be reliable for each device, but it should reliably ensure that they can't export a dangerous voltage to the rack because of their internal earth arrangements.</p><p>The only thing that is a good idea is to connect the short earth jumpers which will have been supplied with the rack to any metal framed hinged doors on the rack itself. The pivot pins often run in plastic bushes so if a cable gets trapped in the door and damaged, it would theoretically be possible for the door frame to contact a live conductor and make the touchable part of the door live without an earth path to trip any protective device.</p><p></p><p>Most of the earthing stuff on 19" racks is for EMF protection of/from devices within them rather than electrical safety</p></blockquote><p></p>
[QUOTE="rjp44, post: 555378, member: 36221"] I can't see any electrical safety reason why you would want to run a separate CPC back to the MET and it may even introduce new dangers. Each device in the rack will have it's own adequate earth through the supply lead and, unless they are Class II, will each incidentally export that earth through the case to parts of the metal rack that they touch. This contact won't be reliable for each device, but it should reliably ensure that they can't export a dangerous voltage to the rack because of their internal earth arrangements. The only thing that is a good idea is to connect the short earth jumpers which will have been supplied with the rack to any metal framed hinged doors on the rack itself. The pivot pins often run in plastic bushes so if a cable gets trapped in the door and damaged, it would theoretically be possible for the door frame to contact a live conductor and make the touchable part of the door live without an earth path to trip any protective device. Most of the earthing stuff on 19" racks is for EMF protection of/from devices within them rather than electrical safety [/QUOTE]
Insert quotes…
Verification
Post reply
Main Forums
Do-It-Yourself (DIY) Question & Answer Forum
Question about Earthing my data equipment
Top