All electrical devices are supposed to be positioned to turn on in the up position. It is a safety precaution. If a device accidentally gets bumped or hit it will turn off due to the effect of gravity pulling on objects with a downward force. If the devices were off in the up position they could inadvertently get bumped or hit into the on position.
There are times when this does not hold true. If a combination panel or a load center is mounted horizontal one side of the board will be opposite to the rule. This is permitted because the panels have closeable doors that protect the breaker handles from getting accidental moved.
AnswerThis is an interesting question, as the above answer only applies in North America as far as it applies to other types of 'switch'. Elsewhere in the world, it is the norm for light- and power-switches to be 'on' when placed in the 'down' position -i.e. opposite to that in North America. The argument that, by using the 'up' position for 'on' prevents a switch from accidentally bumped into the 'on' position when 'off', seems odd -as, surely, bumping a switch could just as easily move an 'up' switch 'down' as vice-versa!
However, for whatever reason, it does seem to be the standard internationally that MCBs are closed, or 'on', when the lever is placed in the 'up' position -regardless of the rule that applies to all other electrical switches.
upward
The wind in a cyclone flows inward and upward in a counterclockwise direction in the Northern Hemisphere and clockwise in the Southern Hemisphere. This upward flow is due to the low pressure at the center of the cyclone, which causes air to rise and create a cyclonic circulation.
The upward force acting on an object is the normal force. It is equal in magnitude, but opposite in direction to the object's weight.
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In the opposite direction, and on the other object. In this case, the chair pushes upward against the person.
upward direction
Yes, upward is an adverb. It means in a vertical direction.
An upward direction is usually considered positive.
upward
A flame's direction is upwards because heat rises.
Convection currents move in upward direction
A buoyant force is produced when an object is completely or partially submerged in a fluid at rest .
Upward
The kinetic energy will be decrease because when the body thrown in upward direction the gravitation force will be act in opposite direction which reduce the velocity.so the velocity will decrease.
The word "upward" is an adverb. It is used to describe the direction of movement towards a higher position or level.
If it is gravitational acceleration then it it is positive in downward and negative in upward direction..if it is not gravitational acceleration then it is depending upon the value of acceleration.
It is a force which acts in the upward direction.