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NC-v4 EAp2:Minimum energy performance

Voltage Drop // mandatory provisions ASHRAE 90.1 - 2010 - ADDENDA 10218

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Sara BENLOUBA
Green building manager
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LEEDuser Basic Member
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Hello everybody,

We are working on a project under LEED V4 certification.

ABOUT PREREQUISITE “MINIMUM ENERGY PERFORMANCE” , we must comply with the ASHRAE mandatory provisions and therefore comply with the VOLTAGE DROP of section 8.4 of ASHRAE 90.1 - 2010. In our case, we will apply the proposed alternative compliance path for meeting the mandatory requirement of ASHRAE 90.1-2010 Section 8.4, Voltage Drop Limitation of the following addendum:

https://www.usgbc.org/leedaddenda/10218

But we don't understand what the ADDENDA means by: "from service entrance to the worst-case connection"?

Does that mean respect the drop voltage from the electrical panel to the sockets? from the final circuit breaker to the outlet? Or other?

Many thanks, 

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Sara BENLOUBA
Green building manager
Confidential
LEEDuser Basic Member
13 thumbs up

Wed, 11/23/2022 - 07:34

Hello,  Someone have any experience with this issue?  Thanks a lot,   

Fri, 12/16/2022 - 15:13

The total voltage drop for the combination of feeder conductors and branch circuits may not exceed 5%. This would include all wires from the service equipment to the outlets. These are defined as follows: feeder conductors: the wires that connect the service equipment to the branch circuit breaker panels. branch circuit: the circuit conductors between the final overcurrent device protecting the circuit and the outlet(s); the final wiring run to the load. service equipment: the necessary equipment, usually consisting of a circuit breaker or switch and fuses and accessories, located near the point of entrance of supply conductors to a building or other structure (or an otherwise defined area) and intended to constitute the main control and means of cutoff of the supply. Service equipment may consist of circuit breakers or fused switches provided to disconnect all under-grounded conductors in a building or other structure from the service entrance conductors.

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