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AGE of AIR CONDITIONERS & HEAT PUMPS
AGE of HEATERS, BOILERS, FURNACES
AIR CONDITIONING & HEAT PUMP SYSTEMS
AIR FILTERS for HVAC SYSTEMS
AIR HANDLER / BLOWER UNITS
APPLIANCE EFFICIENCY RATINGS
BOOKSTORE - InspectAPedia
BTU USAGE MONITORS
BUILDING SAFETY HAZARDS GUIDE
CAPACITORS for HARD STARTING MOTORS
COOL OFF HEAT, Thermostat Switch
CONVECTOR HEATERS - HYDRONIC COILS
DEFINITION of Heating & Cooling Terms
DIAGNOSTIC GUIDES A/C / HEAT PUMP
DIAGNOSE & FIX HEATING PROBLEMS-BOILER
DIAGNOSE & FIX HEATING PROBLEMS-FURNACE
DUCT SYSTEM & DUCT DEFECTS
ELECTRIC HEAT, DIAGNOSIS, REPAIR
ELECTRIC MOTOR DIAGNOSTIC GUIDE
ELECTRIC MOTOR OVERLOAD RESET SWITCH
FAN CONVECTOR HEATERS - HYDRONIC COILS
FAN LIMIT SWITCH
FURNACE CONTROLS & SWITCHES
FURNACE EFFICIENCY, HIGH vs MID
FURNACE OPERATING TEMPERATURES
GALVANIC SCALE & METAL CORROSION
GEOTHERMAL HEATING SYSTEMS
HEAT LOSS INDICATORS
HEAT LOSS PREVENTION PRIORITIES
HEATING COST SAVINGS
HEATING LOSS DIAGNOSIS-BOILERS
HEATING LOSS DIAGNOSIS-FURNACES
HEATING SMALL LOADS
HEATING SYSTEM INSPECT DIAGNOSE REPAIR
HEATING SYSTEM NOISES
HEATING SYSTEM TYPES
HOT WATER HEATERS
INSULATION INSPECTION & IMPROVEMENT
LOW VOLTAGE BUILDING WIRING
LOW VOLTAGE TRANSFORMER TEST
MANUALS & PARTS GUIDES - HVAC
MOTOR OVERLOAD RESET SWITCH
NO HEAT - BOILER
NO HEAT - FURNACE
NOISE / SOUND DIAGNOSIS & CURE
NOISE AIR CONDITIONER / HEAT PUMP
NOISE, DUCT VIBRATION DAMPENERS
NOISE, HEATING SYSTEMS
RADIANT HEAT Floor Mistakes to Avoid
RADIANT HEAT TEMPERATURES
RADIANT SLAB FLOORING CHOICES
RADIANT SLAB TUBING & FLUID CHOICES
SAFETY, HEATING INSPECTION
SAFETY RECALLS CHIMNEYS VENTS HEATERS
THERMAL EXPANSION of MATERIALS
THERMAL IMAGING, THERMOGRAPHY
THERMAL MASS in BUILDINGS
THERMOSTATS, HEATING / COOLING
WINTERIZE A BUILDING
WOOD, COAL STOVES & FIREPLACES
WOOD STOVE SAFETY
Electric baseboard heat wiring & location specifications: here we explain wiring sizes, ratings, fusing, and overcurrent protection for electric heaters and electric baseboards, followed by notes on the proper location for electric heating baseboards to avoid overheating or fires. Sketch at page top courtesy of Carson Dunlop.
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The wiring sizes and overcurrent protection for electric heat must be correct for fire safety, as Carson Dunlop's sketch demonstrates.
Special electrical wire used for electric heating circuits is coded with red or orange plastic exterior sheathing and contains internal conductors colored black (hot) and red (hot) as well as a ground wire.
The sketch at above right handles a common electric heat wiring detail where this special electric heating wire has not been used. Since usually our electric heaters are 240V and require two hot wires, it's common for an electrician to run conventional 12-2 NM plastic electrical cable or BX armored cable to the heater.
In order to avoid confusion during future electrical work, the white wire of the black-and-white wire pair is wrapped with black electrical tape wherever its ends are exposed for wiring connections. This tells future electricians that this is a "hot" wire, not a neutral wire.
Overcurrent protection for electric heat: Electric 240V heaters also should be powered from circuit breakers using a common trip tie or fuses that are linked together - (we don't want just one leg of the circuit to be turned off or to trip off in an emergency).
Here are some suggested safety details to avoid a fire from electric baseboard heat. Sketches courtesy of Carson Dunlop.
As we discussed at Electrical Outlet, how to install, we don't place electrical outlets over or too close to the ends of electric baseboard heaters. (Sketch above at right).
Don't locate curtains or drapes over or in front of electric heaters. Keep drapes and curtains at least 8" above electric baseboards, and at least 3" in front of them. The reason for the 1" floor clearance is also to allow air to circulate. Circulating air both helps the heat to enter the occupied space and it also helps prevent the curtain from becoming too hot.
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