Service Calculation

[GSXR600]

I am taking a service calc. class.. I am confused on calculating the load for commerical receptacle loads.

If I have receptacles and I know the loads i should only calculate them at 180 VA of 1 VA per square foot. I am reffering to refrigerators, owner furnished equipment, dedicated copier receptacles????

I appreciate your thoughts I am sure that the 180 VA covers for these instances

 

[david luchini]

Per 220.14(A), I'd say the outlet for a specific appliance should be calculated based on the ampere rating of that appliance, not at 180VA.

 

[Dennis Alwon]

Per 220.14(A), I'd say the outlet for a specific appliance should be calculated based on the ampere rating of that appliance, not at 180VA.

I second that emotion..

 

[maghazadeh]

david luchini
Per 220.14(A), I'd say the outlet for a specific appliance should be calculated based on the ampere rating of that appliance, not at 180VA.

I second that emotion..

Me three

But my thinking is that in commercial all loads consider to be continous load, therefore each receptacle is calculated at 125%. 180VA x 1.25 = 225 VA.

Outlet for a specific appliance should be calculated based on the ampere rating of that appliance,

 

[Smart $]

Me three

But my thinking is that in commercial all loads consider to be continous load, therefore each receptacle is calculated at 125%. 180VA x 1.25 = 225 VA.

Cannot second that [eh] notion....

 

[Smart $]

...calculate them at 180 VA of 1 VA per square foot.
...

The 180VA requirement is not based on area (square footage), but rather each receptacle yoke. Furthermore, this calculation is for general-use receptacles, which are often called convenience outlets.

As others mention, specific loads such as those you mention, are calculated at their known or surmised VA. High VA loads should be supplied by an individual branch circuit.