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.
The movement of a body part upward is called elevation. This typically refers to moving a body part in an upward direction, such as lifting the shoulders or raising the arms.
The arrow pointing upward on a map is called a compass rose. It indicates the direction of north on the map.
Winds flow upwards from the eye in a cyclone, because the warm air from the sea rises. This is in addition to winds flowing in a clockwise direction in the southern hemisphere and an anti-clockwise direction in the northern hemisphere.
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.
An upward mountain is a term used to describe a mountainous ascent, where the terrain inclines in an upward direction as one climbs higher. It refers to the physical act of climbing a mountain upwards.
Yes, upward is an adverb. It means in a vertical direction.
An upward direction is usually considered positive.
Upthrust, also known as buoyancy force, acts opposite to the direction of gravity. It pushes objects upward when they are submerged in a fluid, such as water.
Convection currents move in upward direction
A flame's direction is upwards because heat rises.
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.
The value of acceleration due to gravity (g) in the upward direction is typically taken as -9.81 m/s^2, where the negative sign denotes the opposite direction from the conventionally positive direction of the acceleration vector.
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.
A pulley system or lever can change the direction of a downward input force into an upward output force by redirecting the force through a different path or changing the direction of application. This allows for lifting or moving objects in the upward direction despite the initial force being applied in a downward direction.