CF-Village-CS 890224 (2)GINN, INC. CONSULTING ENGINEERS
February 24, 1989
Mr. Karl D. Hirschey
Cajun Contractors, Inc.
P.O. Box 540487
Dallas, Texas 75354-0487
Re: Village Parkway Pump Station
City of Coppell, Texas
Proposed Change Order - Electrical Breakers
Dear Mr. Hirschey:
We have been requested by the City of Coppell's Building
Inspection Department to investigate the possibility of adding
remote trips for the main service breakers on the above
referenced project.
Enclosed is a letter from C.R. McCreary and Associates which
outlines the additional materials required for this modification.
Please review the enclosure and prepare a proposal for this work.
Upon receipt of your proposal, we will discuss the matter with
the City of Coppell and determine if a formal change order will
be pursued.
Please call if you have any questions.
Sincerely,
Sanford W. Case, P.E.
Project Manager "
enclosure
cc: Russell Doyle, P.E.
Steve Goram
Dale Jackson
Joe Kotrla, P.E., C.R. McCreary and Associates
H. Wayne Ginn, P.E.
Gabe Favre
J.R.File Richardson380
17103 Preston Road · Suite 100 · LB 118 · Dallas, Texas 75248 · Phone 214/248-4900
CONSULTING ENGINEERS
,' SUITE 217
CHAR/ES R. tl//cCREARY & ASSOC/ATES : fREEWAY
~ DALLAS, TEXAS 75240
,' 214/458-8M5
Mr. Sanford Case, P.E. --
Ginn, Inc.
17103 Preston Rd., Suite 100
Dallas, Texas 75248
Re: Village Parkway Pump Station
C~.Ly of Coppell, Texas
Subject: City of Coppell Electrical Ordinance
Dear Sanford,
I met with Mr. Dale Jackson of the City of Coppell earlier this week regarding
the City Electrical Ordinance. He gave us permission to let the main breakers
be tripped from the outside of the building.
Please initiate a change to do this. The breakers are already specified to be
electrically operated, so all we have to do is add the pushbuttons, control
wiring, and the enclosures. The contractor will need to do the following:
1. Install a 3/4 inch conduit with 5 # 12 awg control wires from the
switchgear to a NEMA 3R enclosure on an outside wall. The conduit should
be in the slab. The enclosure should be on the outside building wall
inside of the fence next to the double doors for the switchgear room.
2. The Enclosure shall be NF2~A 3R at least 10" tall by 8" wide by 6"
deep, Hoffman # A-10R86HCR with a # A-10NSP backpanel. The pushbuttons
shall be red in color, maintained type (push to trip, pull to reset) with a
mushroom head, Square D class 9001 type SK. Each pushbutton shall be
mounted in a Square D class 9001 type KY enclosure inside the Hoffman
enclosure. Each pushbutton shall trip its respective main. The pushbutton
shall not re-close the main when ~t is reset, however it will. be required
to be reset before the breaker can be manually re-closed from the ~nside.
3. The outside of the enclosure shall have an engraved nameplate stating "MAIN
BREAKER REMOTE TRIP" with white 1" high letters o~ a red background.
Inside the pushbuttons shall have nameplates stating "MAIN BREAKER ~ 1
TRIP" and "MAIN BREAKER ~ 2 TRIP" white 1/4" high letters on a red
CHAR/ES R. /V/cCREARY & ASSOCIATES
background. Also, there shall be a nameplate on the inside door of the
Hoffman enclosure stating "BREAKERS CAN ONLY BE CLOSED MANUALLY AFTER
TRIP".
Please call if you have any questions or if I can be of any assistance.
Sincerely,
Joseph Kotrla, P.E.
page 2 of 2
CONSULTING ENGINEERS
SUITE 2]7
CHAR/ES R. /I//cCREA£Y & ASSOC/ATES ~3~o lB.~ FREEWAY
DALLAS, TEXAS 75240
214/455.$745
February 16, 1989
Mr. Dale Jackson
City of Coppell
P.O. Box 478
Coppell, Texas 75019
Re: Village Parkway Pump Station
City of Coppell, Texas
Subject: City of Coppell Electrical Ordinance
Dear Mr. Jackson,
This is to confirm our discussion on Monday the 13th of February, 1989. in
order to comply with the City of Coppell's electrical ordinance we will
initiate a change to install remote trip pushbuttons for each main breaker.
These pushbuttons will be on the outside of the building in a lockable
enclosure. The outside of the enclosure will have a permanent nameplate
stating "MAIN BREAKER REMOTE TRIP" in white letters 1" tall on a red
background. Inside two emergency type pushbuttons will be marked "MAIN
BREAKER # 1 TRIP" and "MAIN BREAKER # 2 TRIP".
Please notify us if you have any questions or comments.
Sincerely,
~rla, P.E.
CC: Mr. Sanford Case, P.E.
Ginn, Inc.
17103 Preston Rd., Suite 100
Dallas, Texas 75248