Requires terminal box, cabinet installation horizontal, vertical, a horizontal counter of allowed deviation is greater than 1.5 ‰, the level of the terminal box allowed deviation is greater than 1 ‰.
Requires terminal box, cabinet installation level, vertical, a column of cabinet level does not allow deviation greater than 1.5 inches, terminal box level does not allow deviation greater than 1 inch.
The terminal box and cabinet shall be installed horizontally and vertically. The levelness of a row of cabinets shall not be more than 1.5 ‰ and the levelness of the terminal box shall not be more than 1 ‰.