Metering compliance with 240.67(B)

[Tainted]

I have an unmetered service switch that needs Arc Energy Reduction device...

240.67(B) requires fuses to trip at 0.07 seconds or less at the available arcing current. The Arc Energy Reduction methods are these according to the code:

(1) Differential relaying

(2) Energy-reducing maintenance switching with local status indicator

(3) Energy-reducing active arc-flash mitigation system

(4) Current-limiting, electronically actuated fuses

(5) An approved equivalent means

all of these methods require power to the Arc Energy Reduction device. So if I have an unmetered service switch can I use the unmetered conductors of the service switch to power it? Would that be even legal since it's sort of like stealing energy? I see this one product that does this but can it be used if the service switch is unmetered? See this link to the product: https://boltswitch.com/pdf/Boltswitch_AFR_AFGFR_Flyer.pdf

 

[Elect117]

I have an unmetered service switch that needs Arc Energy Reduction device...

240.67(B) requires fuses to trip at 0.07 seconds or less at the available arcing current. The Arc Energy Reduction methods are these according to the code:

(1) Differential relaying

(2) Energy-reducing maintenance switching with local status indicator

(3) Energy-reducing active arc-flash mitigation system

(4) Current-limiting, electronically actuated fuses

(5) An approved equivalent means

all of these methods require power to the Arc Energy Reduction device. So if I have an unmetered service switch can I use the unmetered conductors of the service switch to power it? Would that be even legal since it's sort of like stealing energy? I see this one product that does this but can it be used if the service switch is unmetered? See this link to the product: https://boltswitch.com/pdf/Boltswitch_AFR_AFGFR_Flyer.pdf

You will have to ask the utility about utilizing the arc reduction device head of the meter. Some utilities allow unmetered connections for safety purposes but some do not.

But if it is a integral part of the switch, then I don't think they would say anything.

 

[Tainted]

You will have to ask the utility about utilizing the arc reduction device head of the meter. Some utilities allow unmetered connections for safety purposes but some do not.

But if it is a integral part of the switch, then I don't think they would say anything.

I just messaged the utility hope they will accept it.

 

[jim dungar]

But if it is a integral part of the switch, then I don't think they would say anything.

The vast majority of these protective devices are configured using control power transformers connected to the load side of the fusible switch, so they would be metered.

 

[Tainted]

The vast majority of these protective devices are configured using control power transformers connected to the load side of the fusible switch, so they would be metered.

What do you mean? Just because a transformer is connected on the load side of fusible switch doesn’t mean it will be metered. The service switch in my situation is not metered at all because it feeds external meter banks

 

[jaggedben]

As I often remind people, the NEC does not give one flying ---- if the equipment is metered, or where the meter is.

The utility may care.

 

[Tainted]

As I often remind people, the NEC does not give one flying ---- if the equipment is metered, or where the meter is.

The utility may care.

I know. I am just curious if anybody had utility care about control wiring for arc flash being powered from an unmetered conductor