m magnetic switching than from atmospheric
disturbances.
Don Gies
Internal
From: Brian Kunde
Sent: Wednesday, November 2, 2022 4:17 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Surge Protection Device required by NEC
[External email: Use caution with l
> <https://link.nfpa.org/publications/79/2021/chapters/7#ID000790001613>.
> See the definition of *surge-protective device (SPD)* in 3.3.104
> <https://link.nfpa.org/publications/79/2021/chapters/3#ID000790001610>.
> The 2018 edition revised the existing requirement in
Don Gies
Internal
From: Richard Nute <ri...@ieee.org> Sent: Tuesday, November 1, 2022 4:03 PMTo: EMC-PSTC@LISTSERV.IEEE.ORGSubject: Re: [PSE
uire an
> appropriate SPD for protection of industrial machinery with safety
> interlock circuits to correlate with Section 670.6 of NFPA 70
> <https://link.nfpa.org/publications/70/2020>.
>
>
>
>
>
> Best regards,
>
> *Don Gies*
>
>
>
>
>
>
&g
I understand that this is also stated in NFPA 79:2020.
Our product would fall under the definition of an industrial machine, but
it does not have an Industrial Control Panel. It does have interlocked
guards and safety functions to prevent the unexpected starting of the motor
when the guard is
A
70<https://link.nfpa.org/publications/70/2020>.
Best regards,
Don Gies
Internal
From: Richard Nute
Sent: Tuesday, November 1, 2022 4:03 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Surge Protection Device required by NEC
[External email: Us
is morning, but above freezing.)
From: Doug Powell
Sent: Tuesday, November 1, 2022 11:28 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Surge Protection Device required by NEC
>From the 2020 Edition, emphasis is mine.
"670.6 Surge Protection. Industrial machinery wit
Sent: Tuesday, November 1, 2022 11:28 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Surge Protection Device required by NEC
>From the 2020 Edition, emphasis is mine.
"670.6 Surge Protection. Industrial machinery with safety interlock control
devices not effectively protec
>From the 2020 Edition, emphasis is mine.
"670.6 Surge Protection. Industrial machinery with safety interlock control
devices *not effectively protected from voltage surges on the incoming
supply circuit* shall have surge protection installed."
It does not say where this protection needs to be
It just came to my attention that section 670.6 of the US National Electric
Code 2017 requires a listed Surge Protection Device (SPD) to be on any
Industrial Machine that has an Interlock, or I assume any kind of safety
function. Is this true? The only information I can find on the internet is
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