1. If the heater itself has Green, Black and White wires coming out of it, those wires are likely to be: Green for Ground, Black for Hot and White for Neutral. (As in the wiring codes for the US or Canada or countries which use similar wiring codes.)
2. When the question goes on to say "Terminals are Brown, Blue and Black", that seems to be in conflict with the information stated above in Line 1. Exactly which terminals are you describing? Are they on a plug on the cable already coming out of the heater? If it is a US-style plug then it might be for use on a 240 Volts outlet, in which case the pins on the plug would possibly have a Brown terminal for the Red "hot" , a Black Terminal for the Black "hot" and a Blue terminal for the Neutral?
3. Alternatively, maybe the questioner is in the UK, and the terminals being described are actually inside a UK-style standard 3-pin power plug, which could have a Brown terminal for Load, a Blue terminal for Neutral and (possibly) a Black Terminal for Earth (= Ground).
4. If the terminals being described in the question are not inside a plug, where exactly are they? Are they in a wall box intended for a hard-wired connection to a water heater?
5. If this is actually an appliance designed for use on 60 Hz supplies such as in in the US or Canada, which it sounds as though it may be from the colors of the wires given in Line 2 above, then you need to check very carefully if it was designed to be used on a US-style 120 Volts outlet, not 240 Volts. THERE SHOULD BE A RATING PLATE ON THE HEATER WHICH TELLS YOU THE VOLTAGE IT WAS DESIGNED TO USE. IT SHOULD ALSO STATE THE POWER TAKEN BY THE APPLIANCE. For domestic or office use it will probably be 3 KiloWatts or less.
6. If the rating plate says the heater was intended for use on a US-style 120 Volt supply, do not try to use it on a 240 Volts supply! (If you do, a fuse will blow and/or a breaker will trip!)
7. If the rating plate says the heater was intended for use on a US-style 240 Volt supply, then, if it is to be used on a UK 240 Volts supply using a UK standard power plug, wire it like this: Black wire to the Brown Terminal in the plug (labelled as Load or Live), White wire to the Blue terminal in the plug (labelled as Neutral), Green wire to the Earth terminal in the plug.
Black goes to brown, white goes to blue, and of course green would be your ground.
Always be sure to switch off the main power switch and breakers at the main panel before you attempt to do any work on any mains power circuit.
White is neutral. Black is hot. Green is ground.
Black is HOT and white is Neutral. Neutral is bonded to ground at main panel.
No. The black is 220, the red is 220, and the ground serves as the neutral. the last answer "no" is correct but the reason is not. the ground is still a ground. the red is 110v and the black is 110v. together they are 220v. the neutral or (common) is for a 110v return. for example a stove or a dryer will have 2 hots a common and a ground because they use 220v and 110v. 220v to power the heating elements and 110 for the controls, light bulbs or the outlet on a stove. A construction heater only uses 220v and only requires the two hots and the ground for safety.
In Bangladesh the color of live is green and neutral is blue and ground is black.
red to positive terminals black to chasis ground
White is typically neutral and black is hot. If you are talking about the bare wire, that is ground.
Black is hot, white is neutral and bare wire is ground. Neutral and ground are bonded together at the main panel.
In standard residential wiring there is a black (hot), white (neutral) and bare wire (ground). There must be a neutral, so not sure what you mean. The neutral and ground are bonded to each other at the main electric panel.
ive always wired black hot,,,white neutral,,,green ground
Black & Red are hot, and White is neutral. If it has no place to connect neutral connect neutral to ground.
It depends on what colors you have and what system you are working with. If you have black white and green, the green is ground, white is neutral, and black is hot.
US NEC Usage: There should be four wires, red, black, white, and bare copper/ground. Depending on application, white might be missing. Red and black are hot, 115V to neutral, 230V between each other, white is neutral, and bare is ground which is also tied to neutral at the distribution panel. If you are connecting a true 230V load, you would use red, black, and ground, connecting red and black to the two "marked" or colored terminals, and ground to the green terminal as well as to the box. If you are connecting a split 115V/230V load, such as a range or dryer in a non mobile-home environment, you would connect red and black as stated, connect white to the neutral/ground pin, and connect ground to the box. Neutral and ground will also need to be connected within the appliance. In a split 115V/230V load, in a mobile home environment, you must keep all four conductors distinct, using a four wire box, so that appliance ground is maintained separately all the way back to the distribution box.