This occurs when current flows from a secondary power source towards the primary power source
What is backfeed?
What is a meter main?
The number of switches used per PV System disconnect must be no more than this number
What is 6?
This marking would not be found on circuit breakers suitable for backfeeding
What is "line" and "load?"
This document is required if a redesign adds or deducts equipment
What is a change order?
This principle states that the allowable amperage of a PV breaker can be found with the equation "(Busbar Amps x 1.2) - Main Breaker Amps = Allowed PV Output"
What is the "120% Rule"?
NEC 705.11 allows for supply-side interconnections to occur anywhere between these two locations
What are the net meter and the main service disconnect?
Both system and equipment disconnects must be rated for these three factors
What are maximum circuit current, available fault current, and maximum voltage?
When following the 120% Rule, the back-fed breaker must include a label warning electricians against doing this
What is relocation?
Fire safety setbacks for systems over 25% / 33% may be ignored if the arrays are located on this type of building
What is a detached, non-inhabitable structure?
This type of service panel, more common in new construction, allows for the PV breaker to be located on either end of the busbar
What is a center-fed panelboard?
This device may be used to create a "tap area" if the service equipment will not accommodate a supply-side tap
What is a junction box?
According to NEC 705.20, a disconnect is required to separate these from the conductors of other systems
What are source output circuits?
According to the NEC, the center of this can be no more than 6' 7" from the floor at its highest position
What is a handled disconnect switch?
AHJs in Oregon frequently reject documents because these differ on the A2 - Roof Layout and Aurora Report
What are pitch/slope, azimuth, and lowest TSRF?
If the main breaker amperage is less than the busbar amperage, and this rule is followed, then a PV breaker can land anywhere in a panel
Supply-side conductors, i.e. the conductors running from the POI to the first OCPD, must be greater or equal to this gauge (dependent on materials)
What is 6 AWG Cu and 4 AWG Al?
Knife-blade switches and breakers are examples of this type of disconnect
What is a load-break-rated disconnect?
Jurisdictions following this must include a disconnect within 10' and line-of-site of the tap, as well as an exterior disconnect for rapid shutdown
What is the Washington Cities Electrical Code?
When trenching, both the length of the trench and the size of the conductors must be considered to avoid this issue
What is voltage drop?
Increasing the size or re-establishing overcurrent protection are two methods of ensuring safe operation of this electrical equipment
What are feed-through conductors (or feeders)?
Using these devices to create a supply-side tap do not require electrical service shutdown, but their bulky size may limit their application in crowded panels
What are insulation-piercing tap splice connectors?
Plug connectors and finger-safe fuse holders are examples of this type of equipment, which is not required to disconnect all non-solidly grounded conductors simultaneously
What is an isolating device?
690.15(A) specifies that equipment disconnecting means must be found inside the equipment itself, or follow these two alternate requirements
What is within sight and within 10' of the equipment?
6.5' x 2.5' x 3'
What are working space requirements for electrical equipment?