I have a project that entails a computer server room that needs to be shutdown per NEC requirements. Right now there is a dedicated panel located in the server room for most of the equipment in the room. Could someone please show me a one line diagram on how to shutdown the panel in the server room, FCU (that is feeding from another panel in an electrical room), and shut down the UPS so it will not continue to run off the battery? Thank you.
Computer server room emergency shutdown diagram
- Thread starter JRCJ
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jtester
Senior Member
- Location
- Las Cruces N.M.
I am unaware of any NEC requirements for computer room shutdown. Could it be another standard? Can you provide some more information?
Jim T
Jim T
Info Tech Shutdown
Info Tech Shutdown
Unable to give you a one-line and I've seen this done in various ways.
The more simple usually invole a stop button/switch that (a) closes a contact to cause a shunt-trip breaker to open disconnecting power to the distribution panel (b) opens the control power on the HVAC system and (c) closes (or opens) contacts which are conmnected to the UPS. (most UPS systems have a "emergency disconnect" contact point.
Variations of this using realys, etc are also common.
jtester: 645.10
Info Tech Shutdown
Unable to give you a one-line and I've seen this done in various ways.
The more simple usually invole a stop button/switch that (a) closes a contact to cause a shunt-trip breaker to open disconnecting power to the distribution panel (b) opens the control power on the HVAC system and (c) closes (or opens) contacts which are conmnected to the UPS. (most UPS systems have a "emergency disconnect" contact point.
Variations of this using realys, etc are also common.
jtester: 645.10
Disconnecting means
Disconnecting means
A disconnecting means is not mandatory, unless you want to apply article 645, which is optional. See http://www.csemag.com/article/CA6290839.html A normally open contact mushroom head e-stop pushbutton would switch 120V to a shunt trip main CB in one or more panelboards, or a similar pushbutton could be wired to the UPS to shut it down. Don't forget the HVAC too. And check with the AHJ about convenience "janitorial" receptacles in the room to see if he/she wants them shutdown too.
Disconnecting means
A disconnecting means is not mandatory, unless you want to apply article 645, which is optional. See http://www.csemag.com/article/CA6290839.html A normally open contact mushroom head e-stop pushbutton would switch 120V to a shunt trip main CB in one or more panelboards, or a similar pushbutton could be wired to the UPS to shut it down. Don't forget the HVAC too. And check with the AHJ about convenience "janitorial" receptacles in the room to see if he/she wants them shutdown too.
- Location
- Illinois
- Occupation
- retired electrician
JRCJ,
There is no reason to apply Article 645. It is an optional article. If you comply with all of the rules in 645.4, then you can use the article. There are some rules that are relaxed when you are using 645, but there is no general rule that requires you use the article.
Don
There is no reason to apply Article 645. It is an optional article. If you comply with all of the rules in 645.4, then you can use the article. There are some rules that are relaxed when you are using 645, but there is no general rule that requires you use the article.
Don
- Location
- New Jersey
- Occupation
- Journeyman Electrician
JRCJ said:
The creation of an IT room under Article 645 allows electrical installations that are more permissive than in the first four chapters of the NEC. For example wiring in a raised floor that is used for environmental air can be types prohibited elsewhere in the NEC for use in environmental air spaces. In IT rooms designed according to Article 645 the area under the raised floor is not considered a plenum space. This allows wiring below the floor to be nonplenum rated cables.
The one caveat to Article 645 installations is that the room must meet all five of the conditions outlined in 645.4. If it fails to meet any of these conditions the room can not take advantage of the less restrictive wiring methods covered under this article.
As Don said this is an option not a requirement.
ron
Senior Member
- Location
- New York, 40.7514,-73.9925
I like the link that sparkie001 listed. I REALLY like that first author! 
I think Don and infinity described why it is optional. You can use it if you want to deal with the prerequisites (reduces reliability), then you can use the leniencies provided in the remainder of 645.
I think Don and infinity described why it is optional. You can use it if you want to deal with the prerequisites (reduces reliability), then you can use the leniencies provided in the remainder of 645.
ron said:I like the link that sparkie001 listed. I REALLY like that first author!
Yeah I have talked with that moran a few times on the phone, clueless
As others have stated 645 is optional. Like Ron I design data centers, phone offices, etc and we avoid 645 installations like the plague for two reasons.
1. That !#@& EPO switch requirement.
2, Extreme expense.
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