ST1002-CS110525 (3)Page 1 of 1
Keith Marvin - FW: Old Coppell townhomes
From: Chris Poteet <cjpgfreese.com>
To: "'Keith Marvin' (kmarvingcoppelltx.gov)" <kmarvingcoppelltx.gov>
Date: 5/25/2011 12:52 PM
Subject: FW : Old Coppell townhomes
Attachments: clearances of padmounted equipment from buildings.PDF
X
Chris Poteet
Freese & Nichols, Inc.
From: Karen. Eastman @oncor.com [mailto: Karen. Eastman @oncor.com]
Sent: Tuesday, May 24, 20117:38 PM
To: gregyancey @verizon.net; Chris Poteet
Cc: rick.fielding @oncor.com
Subject: Old Coppell townhomes
After thinking about everything and the distances I heard mentioned in the meeting today, I don't see any way that
we can maintain our clearance requirement between the transformers and the garage structures. We have to
maintain 5 ft. between the transformer pads and a 2 hour fire rated wall. If there are doors, windows, or vents the
distance increases to 10 ft.
have attached our clearance requirements for your use. Please review and let me know your findings.
Thank You,
Karen Eastman
New Construction Manager
Oncor Electric Delivery
200 North Ector
Euless, Texas 76039
Office 817 - 355 -7050
Fax 817 - 355 -7090
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file: / /C: \Documents and Settings \radloo \Local Settings \Temp \XPgrpwise \4DDCFB85Cit... 10/24/2011
NOTE 4\ A
CONTAINMENT TRANSFORMER PAD
DIKE, NOTE 5 111 1
A -OW PLAN
FIRE
WINDOW OR VENTILATING
DUCT
TRANSFORMER
NOTE 7
NOTE 6
NOTE 6 NOTE 6 FIRE ESCAPE
ELEVATION
TRANSF.
TYPE
BUILDING CONSTRUCTION
WINDOWS,
DOORS &
VENTS
FIRE
ESCAPES
FIRE RESISTIVE
NON- FIRE RESISTIVE
NOTE 3
1 PHASE
5' -0"
10' -0"
10' -0"
20' 4"
3 PHASE
5' -0"
15' 4"
15' -0"
20' -0"
CLEARANCE TABLE
NOTES:
CONTAI
DIKE, N
BUILDING OR
STRUCTURE
1. CLEARANCE FROM BUILDING WALLS SHALL COMPLY WITH THE CLEARANCE TABLE. ALL DIMENSIONS SHOWN ARE MINIMUM DIMENSIONS.
2. WHERE THERE ARE BUILDING EAVES OR OVERHANGS WITHIN 25'- 0' ABOVE GROUND, CLEARANCE SHALL BE MEASURED HORIZONTALLY
BEGINNING FROM THE EDGE OF THE EAVE OR OVERHANG.
3. FIRE RESISTIVE BUIILDING WALLS INCLUDE BRICK AND MASONRY STRUCTURES THAT HAVE A 2 HOUR FIRE RATING.
4. CLEARANCE TO BUILDING DOORS, WINDOWS, VENTS AND FIRE ESCAPES TO BE MEASURED RADIALLY.
5. LIQUID FLOW OF AREA SURROUNDING TRANSFORMER SHOULD BE AWAY FROM BUILDING. WHERE GROUND IS FLAT OR SLOPES TOWARD
BUILDING, A DIKE SUFFICIENT TO CONTAIN ALL TRANSFORMER OIL FOR TRANSFORMERS 500 KVA AND LARGER SHALL BE PROVIDED.
6. CLEARANCES ARE MEASURED FROM PAD EDGE TO BUILDING WALL, OPENING, OVERHANG OR FIRE ESCAPE UNLESS A CONTAINMENT DIKE
IS UTILIZED, IF A CONTAINMENT DIKE IS UTILIZED, CLEARANCE IS MEASURED FROM DIKE.
7. CLEARANCES FOR WINDOWS AND VENTS ABOVE TRANSFORMER ARE MEASURED RADIALLY FROM CLOSEST POINT ON TRANSFORMER.
B. PADMOUNTED TRANSFORMERS SHALL BE POSITIONED SUCH THAT HOTSTICK USE IS NOT REQUIRED ON THE SIDE FACING THE BUILDING.
IF HOTSTICK USE IS REQUIRED ON THE BUILDING SIDE, CLEARANCES SHOWN IN DETAIL SHEET 50 SHALL BE MAINTAINED.
9. THERE SHOULD NOT BE ANY ABOVE GROUND OBSTRUCTIONS, SUCH AS SHRUBS, COOLING TOWERS, GAS METERS, FENCING, ETC. WITHIN
5'- O' OF PAD OR OVERHANGS ABOVE PAD FACILITIES. REFERENCE DETAIL SHEET 50 FOR SCREENING CLEARANCES AROUND PADMOUNTED
EQUIPMENT.
10, THERE SHOULD NOT BE ANY PIPING OR CONDUIT UNDER THE PAD (EXCEPTION: MUTUALLY AGREED UPON COMMUNICATION CONDUITS)
OTHER THAN THOSE ENTERING THE TRANSFORMER.
11. TRANSFORMERS SHALL NOT OBSTRUCT FIRE LANE,
12. IT IS THE OWNER'S RESPONSIBILITY TO COMPLY WITH ANY INSURANCE REGULATIONS AFFECTING THE PREMISES.
CLEARANCES OF
N R PADMOUNTED TRANSFORMERS
FROM BUILDINGS
DDS-4 UG DETAIL SHEET 49 OF 55
DETAIL "A-A"
(11/30/2011) Ken Griffin - Fw: Old Coppell townhomesPage 1
From:
Keith Marvin
To:
Mindi Hurley, Ken Griffin, Gary Sieb
CC:
Clay Phillips
Date:
5/25/2011 1:15 PM
Subject:
Fw: Old Coppell townhomes
Attachments:
FW: Old Coppell townhomes
Fyi... Oncor has a problem with the 6 foot setback between the alley paving and the homes.
Keith