Specifications 70 ci 5 ) 6-0 z�, - aC20O q -. CJ Co 23
p ity of Tigard, Oregon ° 13125 SW Hall Blvd. ° Tigard, OR 97223 4 r
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Ge
Art Peterson
Electro -Wire
18867 SE Sunnyside Rd.
Boring, OR 97009
Re: National Safety Building
Permit Number ELC2009 -00623
Date: Feb. 5, 2010
Mr. Peterson,
Per your request, the City of Tigard has completed the plan review for the above mentioned
project.
Due to the amount of varying information you have submitted with the last nine submittals, the
Senior Electrical Inspector finds to safeguard the safety of the public and to achieve an adequate
capacity be built into the electrical system of the proposed project, I will use the most complete
submittal you have submitted so far dated Dec. 8, 2009, and supplement it with information you
provided subsequent to that date. The Dec. 8, 2009 submittal included two sets of plans and a letter
provided by PGE showing the maximum fault current as 18,656 amps. The maximum fault current
provided by PGE on that date is now incorrect.
I have made all of the adjustments necessary to bring your submittal(s) into compliance with the
Nation Electrical Code. During this process I have used information submitted by you on the following
dates: Dec. 2, 2009, Dec. 8, 2009, Dec. 9, 2009, Dec. 15, 2009, Dec. 21, 2009, Dec. 22, 2009, Jan. 12,
2010, Jan. 13, 2010 and Jan 26, 2010. I have up -dated your drawings to include information you
provided in these submittals.
Please pay particular attention to the following changes:
1. Note the addition of GFCI receptacles to comply with Art. 210.8
2. Note the addition of NE /Night /EM egress lighting added by the building inspector.
3. Note the addition of exit lights added by the building inspector.
4. The ampacity of both feeders located inside the building serving the lower floor panel and the upper
floor panes has changed.
5. The ampacity of the main service and feeder from PGE into the main switchboard has changed.
6. The AIC Maximum Fault current is now 35,160 Amps. You are required to have all main service
equipment designed for this Maximum Fault Current.
7. The feeder supplying the panel on the first floor shall be designed for 315 amps minimum load.
8. The feeder supplying the panel on the second floor shall be designed for 313 amps minimum load.
9. The main service conductors and service equipment shall be designed for 568 amps minimum load.
Phone: 503.639.4171 o Fax: 503.684.7297 o www.tigard- or.gov 0 TTY Relay: 503.684.2772
All corrections are in red ink on the approved plans.
In addition to changes made on the plans, the fees shown on the permit application have changed. This
change is created because of the amount of time charged for the plan reviews completed by me and the
additional fees for the change in feeder sizes and main service equipment size. This amount may change
again depending upon the final count of branch circuits on the final electrical inspection.
A set of stamped approved plans showing the changes shall be available on the job site for review by the
inspector at all times.
Submitted by,
‘,10
Gary Noble
Senior electrical Inspector
City of Tigard
•
•
+ ,an. 29. 2010 2:59PM PGE WLC No. 1049 P. 2
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Portland General Electric C any 11111411\.. «,,,
PGE - -
" _ 01/29/10 / _ -•
___ CONTACT: John Skourtes _
- - PHONE: 503 - 841 -2410 -
'` CUSTOMER NAME: National Safety Co. "
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w' ° ADDRESS: 7103 SW Gonzaga St., Tigard -"=
in =—
t = -! SDC /ENGR: Milo Starr WA: 542785 °_ <k , '
` PHONE: 503 - 570-4414 = :
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4%'.. `M:44.:
ii: 3 -PHASE SECONDARY LINE -LINE FAULT CURRENT (RMS,1
-;> TRANSFORMER DATA " ,:�
X FMR Impedance ( %): 1.3 % 9 -PHASE SUBMERSIBLE x.,
T RANSFORMER SIZE: 300 KVA X FMR? NO ' ='"
,:.::
-- Secondary VOLTAGE (L to L): 208 v WYE ,.
=i:: VAULT - -> VAULT ( or Pole - -> Pole) SECONDARY `�:
=_— S econdary Wire LENGTH: 0 Feet ( WIRE SIZE _,;
Number of SECONDARY RUNS: 1 Run(s) ,.. Ind
ns) of _ };;
f . , :r. Secondary WIRE Resistance R: 0.0180 Ohms/1000'
Secondary WIRE Reactance X: 0.0258 Ohms /1000' ' =?'
:L VAULT ( Pole) - -> PANEL SECONDARY (or Svc Drop) , ,u
�.;- Service Wire LENGTH: 45 Feet WIRE SIZE w :
Number of Service RUNS: 2 Run(s) of 350 QX UG J "R`8
: :xiq Service WIRE Resistance R: 0.0600 Ohms/1000
''r'•= Service WIRE Reactance X: 0.0330 Ohms /1000' 1 '=
,:::.; fir'.`.'.'..;
=' '= MAXIMUM FAULT CURRENT * : 35,160 Amps " °M
`_�.. 'Maximum fault current based upon transformers/conductors sized for 100% H of electrical panel rating.
-• ... • .. : • Based on a panel size of ":600 amp Amps.. -
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A
Building Codes Division Statewide Code Interpretation
Working with Oregonians
to ensure safe building
construction while No: 08'02
supporting a positive Dental Office Patient Care Areas
• business climate.
•
Code Section: 517.13
•
Code Edition: 2008 Oregon Electrical Specialty Code
Date: Re- issued April I 2008
•
Subject: Grounding Requirements for Branch Circuits in Patient Care Areas
Question: Are the receptacles serving dental chairs and their rooms required to have a
ground path for fault current by installation of an additional equipment
grounding conductor?
•
•
Answer: Yes, the wiring method provisions of 517.13(A) apply to all branch circuits
serving patient care areas. Additionally, 517.13(B) requires the installation of an
insulated copper equipment grounding conductor as the second component of
the redundant grounding approach to protection for the patient.
•
Analysis: Section 517.2 of the 2008 NEC does not specifically address a dental chair as one of the
ordinary appliances in a patient care area. However, the definition of Health Care Facilities
includes buildings or portions of buildings in which dental care is provided.
The language in the definition of Patient Care Vicinity implies a concern for conductive
• surfaces that can be contacted by the patient, or an attendant who can touch the patient.
•
•
All fixed equipment and receptacles within 1.8 m (6 ft) of dental chairs shall be installed in
• accordance with article 517.13 (A) and (B). The use of a non - conductive raceway and two
equipment grounding conductors is not recognized as meeting these requirements.
To insure patient safety, the code requires all receptacles that serve utilization equipment
likely to come in contact with a patient during the process of examination or treatment to
• comply with the provisions of article 517.13.
•
Contact: Dennis Clements, Electrical Program Chief, State of Oregon
www.dennis.l.clements @state.or.us
•
(503) 378-4459
•
Building Codes Division ♦ Department of Consumer and Business Services ♦ State of Oregon
1535 Edgewater NW Salem, Oregon • PO Box 14470 Salem, OR 97309 -0404
is
503- 378 -4133 o TTY 503- 373 -1358 • Fax 503- 378 -2322 ♦ bcd.oregon.gov
In accordance with OAR 918- 008 -0110, the information contained in this statewide code interpretation is
legally binding on any party involved in activities regulated by applicable Oregon law, applicable Oregon regulations
or the state building code. If the information contained in this statewide code interpretation is cited as a basis
for a civil infraction, a representative of the jurisdiction must cite the interpretation number found in this document.
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CITY OF TIGARD
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