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For battery storage rooms continuous ventilation shall be provided at a rate of not less than ____ cubic foot per minute per square foot
Manual dampers shall be installed in connectors except in chimney connectors serving solid fuel-burning appliances:
The following lamp holder is approved to be installed in either a damp or wet location?
One listed for use in wet location
An 120 voltage source is supplying a lamp with a resistance of 172 ohms. what is the current flow in the circuit?
What is the delay time permitted to start emergency generators in-case of normal power supply failure?
A solidly grounded system is the system grounded with high value of resistor or impedance.
All 15,20 amperes receptacle outlets installed in bathrooms of dwelling units shall always require _______
Ground fault circuit interceptor
When branch circuits used at outside, the size of overhead conductors for 600 volts or less, for spans upto 50 feet, shall not be less than _______ copper.
A quick recovery Electric heater is rated at 4500 W and operated at 120 V, What will be the rating of circuit breaker to be used to protect it?
A 440 volts motor has a full load current of 34 amperes. what size disconnecting means is required?
A 2 ft branch conductor with a resistance of 2.5 ohms is supplied with 120 V power supply. If 3 amperes current flows in the conductor then what is voltage drop across the conductor?
Working space in rooms allocated for electrical equipment shall not be used for _______
Storage of equipment
The vent vertical termination for mechanical draft system shall be located at least horizontally _____ from any portion of the roof structure:
Flexible cards may not be used in the following locations _______
To replace a fixed wiring of a structure
Vents shall terminate not less than ______ in vertical height above the highest connected appliance flue collar: