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Good post.
Session 17. Where must the service disconnecting means be located? What is the maximum number of disconnects? The service disconnecting means shall be installed at a readily accessible location either outside of a building or inside nearest port of entrance of the service conductors. Service disconnecting means shall not be installed in bathrooms. Each service shall have only one disconnecting means unless installed using one or mor of the methods E3601.7.3. In all cases, the maximum number of disconnecting means for any service shall not exceed six.
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Session 18. Where is ground-fault circuit-interrupter protection mandated? GFCI protection is now required for damp and wet locations not including the other 10 areas requiring GFCI protection. Over kitchen counters, dishwashers, bathrooms, laundry rooms, unfinished basements, garages, many outdoor locations, swimming pools and spas.
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Good post.
- In what locations are the installation of fuel-fired appliances prohibited? What concerns are applicable to outdoor installations?
Fuel-fired appliances are prohibited in sleeping rooms and bathrooms due to safety concerns. Outdoor installations require protection from environmental elements, proper venting, and compliance with clearance requirements to ensure safe operation.
In reference to Writing Assignment #15, 2021 IRC Exam Study Course:
P2801.6Required pan.
Where a storage tank-type water heater or a hot water storage tank is installed in a location where water leakage from the tank will cause damage, the tank shall be installed in a pan constructed of one of the following:
- 1.Galvanized steel or aluminum of not less than 0.0236 inch (0.6010 mm) in thickness.
- 2.Plastic not less than 0.036 inch (0.9 mm) in thickness.
- 3.Other approved materials.
A plastic pan beneath a gas-fired water heater shall be constructed of material having a flame spread index of 25 or less and a smoke-developed index of 450 or less when tested in accordance with ASTM E84.
P2801.6.1Pan size and drain.
The pan shall be not less than 11/2 inches (38 mm) deep and shall be of sufficient size and shape to receive dripping or condensate from the tank or water heater. The pan shall be drained by an indirect waste pipe of not less than 3/4 inch (19 mm) diameter. Piping for safety pan drains shall be of those materials indicated in Table P2906.5
Where a pan drain was not previously installed, a pan drain shall not be required for a replacement water heater installation.
In reference to Writing Assignment #16, 2021 IRC Exam Study Course: The sump shall be not less than 18 inches (457 mm) in diameter and 24 inches (610 mm) deep , unless otherwise approved. The sump shall be accessible and located so that all drainage flows into the sump by gravity. P3303.1
Writing assignment 2: Define Light framed construction.
Light framed construction is type whose vertical and horizontal structural elements are primarily formed by a system repetitive of wood or light gauge steel framing members. Platform construction has the floor framing bear on load bearing walls that do not have run continuous through stories. Ballon framing the wall system extends beyond the floor line.
Safety glazing must be provided with a manufacturers designation specifying who applied the designation, the type of glass and the safety glazing standard with which it complies. The designation must be permanent and not able to be removed without being destroyed. Multi pane assemblies require that at least one pane have the standard permanently applied (Multiple panes not exceeding 1 SF)
Smoke Alarms.
Smoke alarms must be installed in each sleeping room, outside each sleeping area, one on each additional story of the home.
Smoke alarms are required to be interconnected
Alarms must be powered by the primary building power source and have a battery back up.
Where alterations or repairs that require a permit are made, smoke alarms must comply with current code
- What is the minimum waste outlet size for a lavatory? A bathtub? A sink? A laundrytub? A food-waste grinder? A floor drain?
- Bathroom Sink The waste outlet size for a lavatory 1 1/2 inches in diameter.
- Bathtub The waste outlet size for a bathtub is 1 1/2 inches in diameter.
- Kitchen Sink The waste outlet size for a kitchen sink is usually 1 1/2 in diameter.
- Laundry Tub The waste outlet size for a laundry tub 1 1/2 inches in diameter.
- Garbage Disposal The waste outlet size for a food-waste grinder, or garbage disposal, is 1 1/2 inches in diameter.
- Floor Drain The waste outlet size for a floor drain is 2 inches in diameter.
- What type of relief valve or valves is required for a water heater? How is a pressure relief valve regulated? A temperature-relief valve?
The temperature relief valve is designed to open and release water if the water temperature inside the tank becomes excessively high. This helps prevent scalding and other safety hazards.
The pressure relief valve is typically set to open at a specific pressure, commonly around 150 psi.
The temperature relief valve is usually set to open at a specific temperature, commonly around 210°F.
When is an unvented crawl space allowed?
Unvented crawl spaces must have a continuous Class I Vapor retarder installed, sealed with overlapped joints and sealed to the foundation and one of the following: 1. Continuously operating mechanical exhaust 2. Conditioned air supply. 3. Plenum in existing structure. 4. Dehumidification
Can deck guard posts be notched?
No. According IRC 507.10.2 “Where 4” x 4" wood posts are used to support guard loads applied to the top of the guard, such posts shall not be notched at the connection to the supporting structure."
- What is the minimum waste outlet size for a lavatory? A bathtub? A sink? A laundrytub? A food-waste grinder? A floor drain?
Minimum waste outlet for lavatory - 1-1/4”
Bathtub - 1-1/2”
Sink - 1-1/2”
Laundry tub - 1-1/2”
Food waste - 1-1/2”
Floor drain - 2”
- When is a water heater required to be installed in a pan? What type of pan is mandated? How big must it be? How shall it be drained?
P2801.6Required pan
Pans are required under tank water heaters. Metal pans of specified metals under gas fired heaters are required. Pan must be 1-1/2” deep. Drained by indirect waste pipe not less than 3/4”
- What is the purpose of a vent piping system?
Though this section focuses on chapter 31,32, 33 the answer to this question is best verbalized in the IRC code in Section 901. A system of vent piping is utilized to establish the emission or admission of air in order to equalize the pressure differential and provide adequate sealant of waste systems to prevent “blow back” and allow the proper operation of gravity flow systems.
- What minimum working clearances are required for energized equipment and panelboards? How is clearance above a panelboard regulated? What is the minimum required headroom?
Found in chapter 34, the minimum working clearance for energized equipment “shall not be less than 36” in depth. Workspace is noted that it shall be clear and accessible to a height of 6.5’.
What parts of a swimming pool, spa, or hot tub must be bonded? What are the acceptable bonding methods? Which equipment must be grounded? How is pool equipment regulated?
Noted in section E4205 a list is provided of all equipment required to be bonded and pool/spas. Wiring methods in conjunction with E4202.2, if not installed in corrosive environments wiring shall be in accordance with chapter 38.
The criteria for exterior plaster weep screeds is as follows:
A minimum 26 ga. galvanized corrosion resistant weep screed or plastic weep screed with a minimum vertical attachment flange of 3.5" below the foundation line not less than 4" above earth grade and not less than 2" above concrete grade.