Ryan,
I am not sure if we are correct or not but I see that we have always put in one
arrester for EACH pump. As you noted the ETL specifically says ..."At least one
arrester will be provided for EACH pump..." Reason and logic many times goes
out the door with the government as I am sure you well know.
Rod DiBona
Vice President
605-348-2342 office
605-348-0108 fax
605-391-3553 cell
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Hinson, Ryan
Sent: Wednesday, May 26, 2010 4:02 PM
To: '[email protected]'
Subject: ETL Surge suppressor configuration
Any takers out there for this ANG ETL related question?
Per ETL 02-15 para A1.4.3.10, "At least one arrester will be provided for each
pump and each must be listed/approved as a surge arrester for fire protection
piping, with a volume of not less than 100 gal and a rated working pressure of
not less than 250 psi. Provide each arrester with an indicating valve to
isolate it from the system." We are having a little argument here in the
office as to whether the intent here is to require separate surge arresters for
each pump or whether the combined required capacities for all surge arresters
can be combined into one large arrester.
Example:
3 pumps = 3 - 100 gal surge arresters
Or
3 pumps = 1 - 300 gal surge arrester
Thank you,
Ryan L. Hinson, EIT, NICET III
Fire Protection Engineer, Aviation & Facilities Group
Burns & McDonnell
Minneapolis-St. Paul Office
8201 Norman Center Drive, Suite 300
Bloomington, MN 55437
Direct: 952-656-6003 Ext 3662
Fax: 952-229-2923
[email protected]
www.burnsmcd.com<BLOCKED::www.burnsmcd.com>
Proud recipient of PSMJ's Premier Award for Client Satisfaction
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