A variety of demandfactors reduce the connected load to the computed load.
Receptacles are typically installed with the grounding slot oriented downward.
For powersystems of 600 V or less, fuses of a higher voltage rating can be applied on circuits of a lower system voltage.
Conductors must be protected in accordance with their ampacity.
The loads should be balanced on phase bus, as discussed earlier.
The amperes interruption current (AIC) rating for circuit breakers should be at least 5000 A and 10 000 A for fuses.
The current carried (amperage) by the electrical circuit or system protected by an OCP device must not exceed the maximum current rating of the circuit breaker.
In most commercial and industrialinstallations, several disconnects may be used.
In a singlepanelboard, not more than 42 overcurrent protection devices may be used for protecting lighting and appliance branch circuits.
The neutral (grounded) and grounding conductors are not protected by overcurrent protection.
