Panel mounted surge protector/s - Questions, Questions??

[trochetier]

My old SPD2 bit the dust. I have questions before I replace. According to the text quoted below from - https://www.diteksurgeprotection.com/understanding-the-2023-nec-rules-for-surge-protection/

"Understanding NEC 2023 Requirements for Surge Protection
In NEC 2023, the code language of Section 230.67(A) was updated to further define “dwelling units”, now reading:
230.67(A) Surge-Protective Device. All services supplying the following occupancies shall be provided with a surge-protective device (SPD):
(1) Dwelling units (2) Dormitory units (3) Guest rooms and guest suites of hotels and motels
(4) Areas of nursing homes and limited-care facilities used exclusively as patient sleeping rooms

Similar code language was added in Section 215.15 for feeders, and Section 225.42 which covers outside branch circuits and feeders. NEC 2023 also introduced Section 409.70, which requires the placement of an SPD to be internal or immediately adjacent to control panels that support personnel protection.
Understanding SPD Types to Satisfy NEC Requirements

Article 230.67(C) of NEC 2020/2023 specifies two types of SPDs and recommends the use of at least one of them for whole house protection. Type 1 SPDs are installed before the main device in the load center, while Type 2 SPDs are positioned on the load side. There is another type of SPD that is commonly in use called Type 3 SPDs; these are also installed on the load side, but closer to actual equipment, such as surge protected power strips and plug-ins. Type 3 SPDs are currently not required by NEC 2023, but as part of current best practices, can still help protect sensitive electronic equipment with an additional layer of protection."

So my questions are -
1. Does SPD type 1, because of its mounting location, provide better protection than SPD type 2? Is permission needed from local power provider needed to install SPD type1?

2. SPD type 2, does mounting in breaker position 1 in the panel provide any more protection than mounting it after the last breaker? (My last one was mounted after the last breaker).

3. Thinking ahead when I install a Level 2 charger for my future EV - would the SPD type and the mounting location in the panel matter?

 

[TLS Guy]

My old SPD2 bit the dust. I have questions before I replace. According to the text quoted below from - https://www.diteksurgeprotection.com/understanding-the-2023-nec-rules-for-surge-protection/

"Understanding NEC 2023 Requirements for Surge Protection
In NEC 2023, the code language of Section 230.67(A) was updated to further define “dwelling units”, now reading:
230.67(A) Surge-Protective Device. All services supplying the following occupancies shall be provided with a surge-protective device (SPD):
(1) Dwelling units (2) Dormitory units (3) Guest rooms and guest suites of hotels and motels
(4) Areas of nursing homes and limited-care facilities used exclusively as patient sleeping rooms

Similar code language was added in Section 215.15 for feeders, and Section 225.42 which covers outside branch circuits and feeders. NEC 2023 also introduced Section 409.70, which requires the placement of an SPD to be internal or immediately adjacent to control panels that support personnel protection.
Understanding SPD Types to Satisfy NEC Requirements

Article 230.67(C) of NEC 2020/2023 specifies two types of SPDs and recommends the use of at least one of them for whole house protection. Type 1 SPDs are installed before the main device in the load center, while Type 2 SPDs are positioned on the load side. There is another type of SPD that is commonly in use called Type 3 SPDs; these are also installed on the load side, but closer to actual equipment, such as surge protected power strips and plug-ins. Type 3 SPDs are currently not required by NEC 2023, but as part of current best practices, can still help protect sensitive electronic equipment with an additional layer of protection."

So my questions are -
1. Does SPD type 1, because of its mounting location, provide better protection than SPD type 2? Is permission needed from local power provider needed to install SPD type1?

2. SPD type 2, does mounting in breaker position 1 in the panel provide any more protection than mounting it after the last breaker? (My last one was mounted after the last breaker).

3. Thinking ahead when I install a Level 2 charger for my future EV - would the SPD type and the mounting location in the panel matter?

NEC 2023 is already out of date. NEC 2024 was introduced at the end of last year, and with good reason.

NEC 2024 and surge protection requires an SPD-1 at entry. So it is fixed to the entry panel. Then every breaker panel must have an SPD-2 installed. If you have a solar system there must be an SPD-2 at the combiner. Make sure you buy quality gear like Siemens for instance.

Getting compliant with NEC 24 is important, and everyone should get up to current code without exception.

I have two panels in the house and solar, so I have four surge protectors installed.

Part of this is worse storms, but the main reason for this is that practically everything is now much more vulnerable to surge. There are ICs in everything. Mechanical relays are not pretty much gone, and IC MOSFET switching is the rule in every appliance. Even every LED light bulb contains at least one IC. So one surge that might have not done any damage in years past, can take down pretty much everything electrical in the home.
This is not theoretical. I have spoken with electricians that have attended home with 100% wipe out.