Transcript
Energy Upgrade California in Southern California Edison and Southern California Gas Territories Technical Training August 27, 2013
Knob and Tube
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Knob and Tube
Article 394 of the 2007 California Electrical Code which is primarily adopted from the 2005 National Electrical Code. Chapter 3: Wiring Methods and Materials. Articles 300‐398 are specific to wiring methods. http://www.hcd.ca.gov/codes/shl/2005NEC/NEC_ISOR_8‐17‐05.pdf
Knob and Tube: Article 394 In Chapter 3, Article 394 and 394.12 are listed: Article 394: Concealed Knob‐and‐Tube Wiring (W/ Amendment) Article 394.12 Exception: [HCD 1] (exceptions 1‐6) • Notice that 394.12 list as Exception, [HCD1] (exceptions 1 through 6).
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Knob and Tube: Article 394.12 Here is what 394.12 Housing and Community Development 1 (HCD1) states:
Exception: [HCD 1] This article is not intended to prohibit the installation of insulation where knob‐and‐tube wiring is present, provided the following are complied with:
Knob and Tube: Article 394.12 1. The wiring shall be surveyed by an electrical contractor licensed by the State of California. Certification shall be provided by the electrical contractor that the existing wiring is in good condition with no evidence of deterioration or improper over‐current protection, and no improper connections or splices. Repairs, alterations, or extensions to the electrical system will require permits and inspections by the authority having jurisdiction for the enforcement of this code.
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Knob and Tube: Article 394.12 2. The certification form shall be filed with the authority having jurisdiction for the enforcement of this code, and a copy furnished to the property owner. 3. All accessible areas in the building where insulation has been installed around knob‐and‐tube wiring shall be posted by the insulation contractor with a notice, clearly visible, stating that caution is required when entering these areas. The notice shall be printed in both English and Spanish.
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Knob and Tube: Article 394.12 4. The insulation shall be noncombustible as defined in Title 24, Part 2, California Building Code. 5. The insulation shall not have any electrical conductive material as part of or supporting the insulation material. 6. Nothing in this exception will prohibit the authority having jurisdiction for the enforcement of this code from requiring permits and inspections for the installations of thermal insulation.
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Additional Requirements Prior to installation of such devices, the occupant must sign a statement in the “Notice of Survey by Electrical Contractor” acknowledging that he/she understands that existing usage of electrical appliances may cause nuisance tripping of the new overcurrent protection devices. Simply put, the circuit breaker may need to be reset from time to time and it may be a “nuisance”.
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Heat Producing Devices (HPDs)
Heat Producing Devices (HPDs) For the purposes of health and safety, the SCE/SoCalGas® Energy Upgrade California Home Upgrade Program is aligning its program requirements with San Diego Gas & Electric (SDG&E). Prior to insulating the attic the contractor must adhere to the following: Submission of Photos of all Heat Producing Devices (HPDs) with barriers/baffles installed around them prior to insulation being installed.
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Heat Producing Devices (HPDs) HPDs include but are not limited to the following: – Recessed light fixtures (exempt if fixtures are IC/AT rated) – Exposed fluorescent fixtures – Doorbell transformers – Fan motors – Metal flues / vent pipes – Masonry chimneys – Gas and electric appliances (e.g. water heaters and furnaces) – Any other device that produces heat
Heat Producing Devices (HPDs) An abandoned vent stack is classified as an HPD because after the contractor has installed the insulation someone else can go back, and reactivate it. The abandoned vent stack is an HPD because the California Mechanical Code (CMC) does not specify the exclusion of an abandoned vent system. Contractors will be required to either block the abandoned vent stack with a barrier, or remove it.
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Heat Producing Device (HPD) Barriers When a metal barrier is installed it will be required to extend at least 4” above the insulation. There are no code specifications for some of the HPD criteria. Best practices from other programs within the utilities are being implemented. Metal blocking shall be permanently attached to the ceiling (attic floor)/framing with screws, staples, or nails. If a contractor uses flexible mineral fiber (batt insulation) blocking it must extend at least 14 ½” away from the specified clearance for combustible materials to the installed insulation.
CMC Code Clearances
All appliances will have specific requirements for the minimum clearance distance that the barrier shall create: Single Wall Vent Pipe: 6” per CMC code Double Wall Type L Vent Pipe: 3”per CMC code Double Wall Type B Vent Pipe: 1” per CMC code The program recommends for best practices that the minimum distance for clearance from any combustible material being blocked by a barrier shall be no less than 3”.
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CMC Code Clearances Gas and electric appliances (e.g. water heaters and furnaces): A clearance zone is required around all units: 12” clearance around top, back, bottom, and sides 24” clearance in front Metal blocking cannot be used for appliances
Non‐Code Listed Clearances For all other HPDs that have no code regulations for clearance, the program will require a minimum clearance of at least 3”: • • • • • •
Recessed light fixtures (exempt if fixtures are IC/AT rated) Exposed fluorescent fixtures Doorbell transformers Fan motors Masonry chimneys Any other device that produces heat
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Indoor Air Quality (IAQ)
Indoor Air Quality
For purposes of maintaining Indoor Air Quality (IAQ), when attic insulation is installed and is in contact with the ductwork, all accessible supply and return duct connections (including duct to register boot connections) are to be sealed with UL‐181 tape, draw bands, mastic, or any other approved duct sealing material.
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Indoor Air Quality – Exception Ducts hanging in the attic that do not come in contact with the insulation installed by the contractor do not require sealing. Please see below for an example.
Indoor Air Quality – Walls
When contractors install wall insulation, and ducts are within a wall cavity, the contractor must seal all duct to register boot connections, located on the walls that are being insulated. This should be done from the interior of the register boot with UL‐181 tape, mastic or other approved duct sealing material.
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Indoor Air Quality – Ventilation
When the scope of work includes air sealing and/or installing attic insulation, the kitchen and bathroom exhaust fan(s) and vent(s) must be continuously connected and exhaust outdoors, in accordance with the local code regulations.
Carbon Monoxide Monitor/Alarm
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CO Monitors Effective September 1, 2013, it will be a program requirement to have a minimum of one Carbon Monoxide Alarm installed per floor in the home. The program will make it a recommendation to follow the suggested guidelines from CAL FIRE, “one monitor/alarm be located outside each sleeping area, and on every level of the home including the basement.”
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QA/QC Inspection Guidelines v4
Prior to Diagnostic Testing All inspections will begin with the following tests completed in the following order: 1. All accessible gas lines must be checked prior to performing any combustion appliance safety or diagnostic tests. If a gas leak is found advise the customer to notify the gas company immediately. Do not perform any combustion appliance safety tests or diagnostic testing until the leak is repaired.
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Gas Leak Detection 2. Leaks will be detected using an electronic leak detector at 1” per one second. If a potential leak is identified, it will be confirmed with soap bubbles.
Note: When a leak has been isolated and/ or corrected, an additional gas leak test will be conducted to verify the leak is repaired and no other leaks are present. If the leak(s) was repaired, then the diagnostic testing will be performed.
Gas Leak Isolation 3. If a gas leak is found and can be isolated: Close the line valve and retest in same place where the gas leak was found with soapy water.
If leak is no longer present proceed with testing.
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Prior to Diagnostic Testing 4. When a gas leak is found and isolated and none of the health and safety issues are found proceed with diagnostic testing. DO NOT TURN ON THE COMBUSTION APPLIANCE THAT HAS A GAS LEAK! Perform all visual inspection and CVA criteria. All other appliances that do not have gas leaks should be tested entirely based on the Inspection Guideline criteria.
Prior to Diagnostic Testing 5. Check for possible asbestos, black organic matter, or any other health and safety concerns in the attic, crawlspace, basement, and the exterior of home. Whenever a correction is necessary the data must be recorded and the homeowner must be informed! A Notice of Unsatisfactory Condition must be filled out and signed by the home owner. A copy will be given to the homeowner and file will be uploaded into Vision.
Diagnostic Testing can be performed if there are no health and safety risks present.
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Kitchen Ambient CO Testing 1. All other gas appliances shall remain off. a. Exception: Water heater pilot may be on, but main burner shall NOT be operating. 2. Exhaust fans and devices shall be turned off during tests of kitchen appliances that are not vented outdoors.
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Kitchen Ambient CO Testing 3. Range/Cooktop: With ovens and broilers off, all range/cooktop burners, and griddle (if present), shall be operated on the highest setting for one minute. CO shall be measured in the center of the kitchen at a height of 6’.
Kitchen Ambient CO Testing 4. Oven and Broiler Units: With cooktop off, each oven shall be operated on highest setting (i.e., “Broil” when applicable) for a minimum of 5 minutes (with separate broiler burner off). When a separate broiler burner is present, it shall be operated on highest setting for 5 minutes (with oven burner off). CO shall be measured in the center of the kitchen at a height of 6’ for oven and separate broiler, when present.
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Kitchen Ambient CO Testing 5. Range and Space Heater or Incinerator Heater/incinerator shall be operated for a minimum of 5 minutes on highest burner setting. Unit shall be tested prior to operating oven/broiler or at least 15 minutes after oven/broiler has been turned off. CO shall be measured in the atmosphere directly above the top of the unit.
Zone Ambient CO Action Levels
SoCalGas Ambient
SoCalGas Ambient
SoCalGas Ambient
Zone/Room Ambient (other than kitchen)
0 – 35 ppm
Exceeds 35ppm
Kitchen Ambient2
0 – 9 ppm
Exceeds 9ppm
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Appliance Ambient CO Test Procedures Natural Gas Heating Appliances Heating appliance shall be operated for a minimum of 5 minutes, and tested under WCD. All other appliances shall remain off. Exception: Water heater pilot may be operating, but main burner shall NOT be operating.
Appliance Ambient CO CO shall be measured in the following locations: Ducted units: In the supply register nearest the furnace. Heaters without ducts (direct vent, wall and floor furnaces, and free‐standing heaters): In the atmosphere directly above the top of the unit.
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Appliance Ambient CO Action Levels The heating system shall be retested under Natural Conditions if Appliance Ambient CO ppm is: Higher than Room Ambient CO Test CO PPM on an FAU from the nearest supply register 2 ppm or higher on any furnace other than an FAU 10 ppm or higher on any water heater.
Appliance Ambient CO Test Procedures Natural Gas Storage Water Heater Water heater shall be operated for a minimum of 5 minutes. All other gas appliances shall remain off. CO shall be measured in the atmosphere directly above the top of the water heater (and draft hood or inducer, if applicable).
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Appliance Ambient CO Test Procedures Natural Gas Clothes Dryer CO shall be measured in the atmosphere directly above the top of the clothes dryer at the back.
Appliance Ambient CO Levels
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Ambient CO Testing Locations
Undiluted CO Action Levels
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Attended Appliances and Fireplace Levels
CVA Table The Inspection Guidelines now include the following Combustion Ventilation Air Criteria: Combustion Ventilation Air Basics Definitions CMC Criteria CVA Calculations Table Known Infiltration Rate Method Round Combustion Air Duct Table Restrictions Factor Table
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Vent Terminations
Any water heater vent terminal located within 10’ of an inlet shall terminate at least 3’ above it. Exception: Clearance not required when the cooler has been removed and the roof opening is sealed.
Vent Terminations Any furnace vent terminal located within 10” of an inlet shall terminate at least 3” above the inlet. Exceptions: Clearance not required under any of the following conditions: The cooler is equipped with a cooler cover. The discharge openings are equipped with a cooler cover. The cooler shares the duct system with the FAU, and there is present a functional damper that isolates the cooler from the duct system during the heating season. The cooler has been removed and the roof opening is sealed.
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Vent Termination – Exceptions When a cover or damper‐related exception applies, the occupants shall be advised by the contractor to do the following, as applicable, during the heating season: Keep the cover(s) in place, or Keep the damper completely closed to isolate the cooler from the duct system.
Exterior Window Measurement Windows shall be measured from outside from the rough opening where the window frame meets the siding or stucco.
Measurements will be taken in ½’ increments. Example: 3030 or 3036
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Processing Guidelines Processing Guidelines include updated information. It is broken down into 3 sections: 1. Recommendation 2. Remediation 3. Fail Advisory Table is included at the end of the Processing Guidelines.
New and Updated Information Water Heater Pipe Wrap is now optional and the criteria is included within the inspection guidelines. The Combustion Appliance Safety Section has had some minor changes due to the Ambient CO test Requirements.
Significant Change: The unit has 60 seconds to pass spillage from start up. ‐ If the unit fails spillage after 60 seconds, retest after 5 minutes. Induced draft and sealed combustion furnaces are exempt from a spillage test.
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