Electrical

Electrical Questions? Ask an Electrician Online.

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

Electrical question here...can anyone give me a brief

Hi, electrical question here...can anyone...
Hi, electrical question here...can anyone give me a brief explanation as to how a SPD type 2 is able to protect an entire subpanel when it’s simply connected a a dedicated breaker along with “8” other breakers connected in the same panel. Does it provide a path of least resistance so that surges are pulled toward that device before choosing the other breakers to travel through?
Show More
Show Less
Ask Your Own Electrical Question
Answered in 10 minutes by:
3/17/2018
David Bowden
David Bowden, Electrician
Category: Electrical
Satisfied Customers: 1,192
Experience: Owner at Floridaco
Verified

Hello and welcome to Just Answer… My name is ***** ***** allow me a few moments while I do some research, my recommendation will appear shortly.

Ask Your Own Electrical Question

Here is an general explanation of how it works...

The ability of an SPD to limit over voltages on the electrical distribution network by diverting surge currents is a function of the surge-protective components, th e mechanical structure of the SPD, and the connection to the electrical distribution network. A surge protective device is intended to limit transient over voltages and divert surge current, or both. It contains at least one nonlinear component. In the simplest terms, surge protective devices (SPDs) are intended to limit transient over voltages with a goal of preventing equipment damage and downtime due to transient voltage surges reaching the devices they protect.

A useful analogy makes this clearer. Consider a water mill protected by a pressure relief valve. The pressure relief valve does nothing until an over-pressure pulse occurs in the water supply. When that happens, the valve opens and shunts the extra pressure aside, so that it won’t reach the water wheel.

If the relief valve was not present, excessive pressure could damage the water wheel, or perhaps the linkage for the saw. Even though the relief valve is in place and working properly, some remnant of the pressure pulse will still reach the wheel. But pressure will have been reduced enough not to damage the water wheel or disrupt its operation. This describes the action of surge protective devices. They reduce transients to levels that will not damage or disrupt the operation of sensitive electronic equipment.

Ask Your Own Electrical Question

Another way to think of these is they are back feed protection devices.

Ask Your Own Electrical Question
Customer reply replied 4 months ago
Great explanation. Thank you so much!

You are most welcome...

One of the goals here at Just Answer, is to provide each customer with the best experience possible and for the experts to earn a 5 Star Rating based on their responses, recommendations, and professionalism, when answering questions. If I have achieved that goal for this question, please take a few moments to rate my service and select the 5 Stars before logging out.

It has been my pleasure providing an answer for you today, however if additional service is needed, please use the reply box to let me know and I will respond back once I have the requested information.

Enjoy the rest of your day,

Dave

David Bowden
David Bowden, Electrician
Category: Electrical
Satisfied Customers: 1,192
Experience: Owner at Floridaco
Verified
David Bowden and 87 other Electrical Specialists are ready to help you
Ask your own question now

Thank you very much for the positive rating, I sincerely ***** ***** If you need further assistance or help with another question, just let me know.

Best,

Dave

Ask Your Own Electrical Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with an electricianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask David Bowden Your Own Question
David Bowden
David Bowden
David Bowden, Electrician
Category: Electrical
Satisfied Customers: 1,192
1,192 Satisfied Customers
Experience: Owner at Floridaco

David Bowden is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.

JimmyBagley, IA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Mike

Mike

Master Electrician

1,426 satisfied customers

Licensed Master Electrician - OnQ Certified Data Voice Audio Video Installer

Jason

Jason

Service Technician

3,958 satisfied customers

Over 20 years of experience in all types of installations, troubleshooting, and repairs.

Mike G.

Mike G.

Master Electrician

8,196 satisfied customers

Proven Professional 49 years Experience

Kevin

Kevin

Licensed Electrical Contractor

4,345 satisfied customers

31 years Licensed Electrical Contractor in Illinois, Adjunct College Electrical Instructor, Former Electrical Inspector, Diploma: Digital Electronics, FCC Technician License

AssuredElectrical

AssuredElectrical

Master Electrician

3,264 satisfied customers

Contractor-42+ Years in the ElectricalTrade

electrifier

electrifier

Master Electrician

1,458 satisfied customers

Electrical contractor and electrical inspector for over 24 years with phone and networking expertise

Rich

Rich

Master Electrician

1,117 satisfied customers

Over 35 years residential, commercial, industrial wiring, install, troubleshoot, service, maintain

< Previous | Next >

Related Electrical Questions
I want to install a Type 2 SPD to protect all pool equipment
Hi Kevin, I want to install a Type 2 SPD to protect all pool equipment wired to one sub panel. Can I simply install a double pole breaker in that panel and connect L1 and L2 to it? Or, am I able to co… read more
Kevin
Kevin
Licensed Electrical Contractor
Diploma
4,345 satisfied customers
I'm interested in buying a whole house surge protector for
I'm interested in buying a whole house surge protector for both my home and my RV. I read that I should compare "clamping voltage", "energy absorption", "millisecond delay", and that it should meet UL… read more
Phil
Phil
Consultant to Engrs, Govt & Contractors
Degree, Mech Engr Technology
3,671 satisfied customers
Looking to install a whole house serge production device
Looking to install a whole house serge production device (SPD) but I don't have an empty 2-pole slot in the service panel. All singe pole breakers have been replaced with double breakers. I'm curious … read more
Mike G.
Mike G.
Master Electrician
Vocational, Technical or Trade Scho
8,196 satisfied customers
Need recommendations - I am putting electric into a new
Need recommendations - I am putting electric into a new large chicken coop. Running from the house I have 10-2 UF to a point 50 feet from the coop. First thing I need is to couple the 10-2 to the lead… read more
Jason
Jason
Service Technician
Associate Degree
3,958 satisfied customers
We are installing a Jenn-Air dishwasher, JDB9000CW, and I do
We are installing a Jenn-Air dishwasher, JDB9000CW, and I do not see a cord and plug at the back of the dishwasher. I am uncertain where the best location is for the dedicated 20 amp outlet as the gra… read more
Kevin
Kevin
Licensed Electrical Contractor
Diploma
4,345 satisfied customers
Installing Eaton surge protector (model CHSPT2ULTRA) with four
Installing Eaton surge protector (model CHSPT2ULTRA) with four AWG 12 lead wires. Instructions say to wire these to neutral, ground, and a 2-pole 50 Amp breaker in the subpanel (SquareD QO816L100S), b… read more
Kevin
Kevin
Licensed Electrical Contractor
Diploma
4,345 satisfied customers
I am buying a Nissan Leaf which requires a true grounded three prong outlet (no gfci). I
I am buying a Nissan Leaf which requires a true grounded three prong outlet (no gfci). I have two separate knob and tube runs powering my garage, can I use that run to add a new small grounded circuit… read more
AssuredElectrical
AssuredElectrical
Master Electrician
High School or GED
3,264 satisfied customers
My garage has two outlets. One outlet is a GFCI that will
My garage has two outlets. One outlet is a GFCI that will allow for two plugs. The other outlet allows for a single plug and looks like the kind of outlet you'd use to run an appliance (standard recta… read more
Kevin
Kevin
Licensed Electrical Contractor
Diploma
4,345 satisfied customers
Specifications needed for my surge protector design...
I have designed a casing for a surge protector. It will cover the standard wall outlet plate (the type which allows 2 electronic devices to be plugged in). My question is, what specifications do I nee… read more
Machinc
Machinc
Retired
1,010 satisfied customers
good morning, our home is knob and tube wiring upgraded to
good morning, our home is knob and tube wiring upgraded to a newer 100 amp service. we are not electricians and know this is likely problematic (old wires adapted to new system). we have just had two … read more
Kevin
Kevin
Licensed Electrical Contractor
Diploma
4,345 satisfied customers
I have an electrical question.I would like to know what the
I have an electrical question.I would like to know what the code says about Kitchen outlets.I thought the kitchen had to have two dedicated circuits one for the counter and one for the refrigerator My… read more
Kevin
Kevin
Licensed Electrical Contractor
Diploma
4,345 satisfied customers
When my Leviton 51120-1 is operating, I notice the two led
When my Leviton 51120-1 is operating, I notice the two led green lights sometimes glow so low that it is highly difficult to see it functioning only when you move quite close. And sometimes it is pret… read more
Kevin
Kevin
Licensed Electrical Contractor
Diploma
4,345 satisfied customers
Can a house be safe if one only install a surge protector without
Can a house be safe if one only install a surge protector without a circuit breaker? How safe?… read more
Kevin
Kevin
Licensed Electrical Contractor
Diploma
4,345 satisfied customers
I had several appliances in the house fry, and even surge protectors
I had several appliances in the house fry, and even surge protectors melted, when I suffered an open neutral line caused by the power company's line. Is there any device or whole house surge protector… read more
Kevin
Kevin
Licensed Electrical Contractor
Diploma
4,345 satisfied customers
the surge-protective device that is permitted to be connected
the surge-protective device that is permitted to be connected to the supply side of the service is a: (a) type 3 spd (b) type 2 spd (c) type 1 spd. (d)type spd(tvss). ?????… read more
electrifier
electrifier
Master Electrician
Bachelor's Degree
1,458 satisfied customers
The Surge-Protective Device that is permitted to be connected
The Surge-Protective Device that is permitted to be connected to the side of of the service disconnect is a ? {a}- Type 3 SPD {b} Type 2 SPD {c} type 1 SPD or {d} Type SPD {tvss} . Per 2008 code book.… read more
electrifier
electrifier
Master Electrician
Bachelor's Degree
1,458 satisfied customers
How can we protect our home from lightening Our front ...
How can we protect our home from lightening? Our front gate mechanism, sprinkler system and home theatre equipment had to be re-set numerous times due to lightening strikes (at least according to our … read more
Jason
Jason
Service Technician
Associate Degree
3,958 satisfied customers
I just bought an older house with a pool. The main panel ...
I just bought an older house with a pool. The main panel has a 20 amp double pole breaker that goes out to a "subpanel" in the pump room. This panel has a double pole 20 amp breaker that goes to a 220… read more
Electrical Doctor
Electrical Doctor
Master Electrician
Associate Degree
8 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x