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How is the total load in volt-amperes for lighting purpose determined?
Wiki User
∙ 11y ago
LxW of building x 3 volt amps per sq. foot
Wiki User
∙ 11y ago
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Can you use 14 gauge wire with a 15 amp breaker for recessed lighting?
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Formula for calculating btu for a room metric?
Calculating your air conditioning requirementsHeat LoadThe amount of heat generated is known as the heat gain or heat load. Heat is measured in either British Thermal Units (BTU) or Kilowatts (KW). 1KW is equivalent to 3412BTUs.The heat load depends on a number of factors, by taking into account those that apply in your circumstances and adding them together a reasonably accurate measure of the total heat can be calculated.Factors include:The floor area of the roomThe size and position of windows, and whether they have blinds or shadesThe number of room occupants (if any)The heat generated by equipmentThe heat generated by lightingFloor Area of RoomThe amount of cooling required depends on the area of the room. To calculate the area in square metres:Room Area BTU = Length (m) x Width (m) x 337Window Size and PositionIf, your room has no windows, you can ignore this part of the calculation. If, however there are windows you need to take the size and orientation into account.South Window BTU = South Facing window Length (m) x Width (m) x 870North Window BTU = North Facing windows Length (m) x Width (m) x 165If there are no blinds on the windows multiply the result(s) by 1.5.Add together all the BTUs for the windows.Windows BTU = South Window(s) BTU + North Window(s) BTUOccupantsYou will have to take that into account people who normally working in the space. The heat output is around 400 BTU per person.Total Occupant BTU = Number of occupants x 400EquipmentClearly most heat in a room is generated by the equipment. This is trickier to calculate that you might think. The wattage on equipment is the maximum power consumption rating, the actual power consumed may be less. However it is probably safer to overestimate the wattage than underestimate it.Equipment BTU = Total wattage for all equipment x 3.5LightingTake the total wattage of the lighting and multiply by 4.25.Lighting BTU = Total wattage for all lighting x 4.25Total Cooling RequiredAdd all the BTUs together.Total Heat Load = Room Area BTU + Windows BTU + Total Occupant BTU + Equipment BTU + Lighting BTUThis is the amount of cooling required so you need one or more air conditioning units to handle that amount of heat.
How is the total in volt-amperes for lighting purpose determined?
LxW of building x 3 volt amps per sq. foot
How is the total load in volt amperes for lighting purpose determined?
LxW of building x 3 volt amps per sq. foot
How is total lighting load in amperes determined?
This is an answer that must be determined from the course material. There are several ways to do this.
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