Join the #1 Electrical Testing Network

TestGuy is a free online community dedicated to the fine art of power distribution testing, maintenance and troubleshooting. We offer resources to help field technicians gain the knowledge necessary to properly test, assess, and validate electrical equipment.

Check us out on social media

Trending Now
- Witnessed an arc flash today on a 1200A distribution panel
  
  Safety and Arc Flash Talk (8 replies)
  
  I was doing an infrared scan for an electrical contractor on a 120V 1200A distribution board, and as they were closing up the front cover, one of the panel...
  
  Last post by rofo42 2 Days Ago
- Basis for 50V limit for de-energized work
  
  Safety and Arc Flash Talk (3 replies)
  
  So, I've been quizzed to answer this question. What is the basis for the 50V (30V) limit for de-energized work, and where do you find it written? I am...
  
  Last post by rofo42 2 Days Ago
- XFMR test question - wye-delta TTR
  
  NETA Level 2 Exam (9 replies)
  
  A wye-delta transformer has a primary line voltage of 7200 V and a secondary line voltage of 480 V. What is the turns ratio? Your Answer: 15:1 Not sure...
  
  Last post by Wanderer20001us 3 Days Ago
- Questions from recent Level 2 exam (10/2017)
  
  NETA Level 2 Exam (9 replies)
  
  Here are some recent questions from the Level 2, they were given to me by a co-worker who took the exam in October. 1. What connections are on a DLRO...
  
  Last post by SecondGen 4 Days Ago
- Level III Questions, seen recently (from memory bear with me), help?
  
  NETA Level 3 Exam (29 replies)
  
  I've got a few questions I saw on the exam recently: 1: Which oil test is not required on silicone transformer oil? 2: What is the best way to test a...
  
  Last post by Wanderer20001us 4 Days Ago
- anyone taking lvl 3 this month
  
  NETA Level 3 Exam (4 replies)
  
  i'm going april 27th anyone taken it this cycle already?
  
  Last post by killaray 6 Days Ago
- Megger Free Webinars
  
  Electrical Testing Talk (0 replies)
  
  I’m not sure if you guys know, but every month Megger offers a free webinar. Once you sign up for one, you get notifications via email of the next upcoming...
  
  Last post by ElectricalTestTech 6 Days Ago
More topics: Electrical Testing Talk | Safety & Arc-Flash | NETA Exam Prep
Advertisement
Technical Articles
- Zone Selective Interlocking (ZSI) Basic Principles
  
  This guide provides a basic overview of zone selective interlocking principles and test procedures. Continue Reading
  
  Posted By testguy 2 Weeks Ago
- Transformer Winding Resistance Testing Explained
  
  An introduction to transformer winding resistance test methods and procedures. Continue Reading
  
  Posted By testguy March 18, 2018
- Electrical Shock and Arc Flash PPE Overview
  
  This guide provides an overview of PPE that may be required for safe electrical work, including insulated gloves, arc flash clothing, insulated tools and other electrical protective equipment. Continue Reading
  
  Posted By testguy December 10, 2017
- 10 Electrical Distribution System Arrangements Explained
  
  The selection of a distribution arrangement has a profound impact upon the reliability and maintainability of the electrical system. Continue Reading
  
  Posted By testguy September 22, 2017
- Transformer Diagnostics and Condition Assessment
  
  Determining the existing condition of power transformers is an essential step in analyzing the risk of failure. Continue Reading
  
  Posted By testguy June 23, 2017
- 6 electrical tests for Current Transformers explained
  
  The importance of current transformer tests is often underestimated. CT's for metering purposes must have a high degree of accuracy to ensure accurate billing while those used for protection must... Continue Reading
  
  Posted By testguy May 12, 2017
- Primary vs. Secondary Injection Testing for Circuit Breakers
  
  The field-testing and calibration of solid-state trip units can be performed by either primary current injection method or secondary current injection method. The advantages and disadvantages of each... Continue Reading
  
  Posted By testguy March 14, 2017
Browse more technical articles...
Popular on TestGuy
- Level III Questions, seen recently (from memory bear with me), help?
  
  NETA Level 3 Exam (29 replies)
  
  I've got a few questions I saw on the exam recently: 1: Which oil test is not required on silicone transformer oil? 2: What is the best way to test a...
  
  Last post by Wanderer20001us 3 Days Ago
- Shorting transformer windings for PI, why is it done?
  
  Electrical Testing Talk (13 replies)
  
  Had an interesting discussion on the job today about shorting together transformer windings when doing a PI test. Every technical manual I've come across tells...
  
  Last post by wooddy January 16, 2018
- Anyone Pass Since the Change?
  
  NETA Level 2 Exam (9 replies)
  
  Has anyone passed the level 2 since they changed it? If so, could you give some pointers as to what kind of material it covers/what to study? I'm taking it...
  
  Last post by adamstraub March 15, 2018
- XFMR test question - wye-delta TTR
  
  NETA Level 2 Exam (9 replies)
  
  A wye-delta transformer has a primary line voltage of 7200 V and a secondary line voltage of 480 V. What is the turns ratio? Your Answer: 15:1 Not sure...
  
  Last post by Wanderer20001us 2 Days Ago
- Questions from recent Level 2 exam (10/2017)
  
  NETA Level 2 Exam (9 replies)
  
  Here are some recent questions from the Level 2, they were given to me by a co-worker who took the exam in October. 1. What connections are on a DLRO...
  
  Last post by SecondGen 3 Days Ago
More topics: Electrical Testing Talk | Safety & Arc-Flash | NETA Exam Prep
Explore by Tag

acceptance testing arc flash cable and busway cheat sheets circuit breakers codes and standards high voltage how-to guides maintenance megger neta neta certification neta exam neta exam questions neta exam tips neta level 2 neta level 3 neta study tips protection and control protective relays reference guides safety substations switchgear test and measurement test equipment test procedures transformers ttr winding resistance

Electrical Testing Forum
1. Electrical Testing Talk
  (5 Viewing)
  
  Open electrical testing discussion covering all equipment and voltage classes.
  Last post in
  Megger Free Webinars
  
  by
  ElectricalTestTech
  
  View Profile
  
  View Forum Posts
  
  Visit Homepage
  
  View Articles
  
  6 Days Ago
2. Safety and Arc Flash Talk
  (1 Viewing)
  
  Share electrical safety tips and talk about staying safe on the job site.
  Last post in
  Witnessed an arc flash today...
  
  by
  rofo42
  
  View Profile
  
  View Forum Posts
  
  View Articles
  
  2 Days Ago
NETA Exam Help Forum
1. NETA Level 2 Exam
  (3 Viewing)
  
  Discuss the NETA Level II Assistant ETT exam.
  Last post in
  XFMR test question -...
  
  by
  Wanderer20001us
  
  View Profile
  
  View Forum Posts
  
  View Articles
  
  3 Days Ago
2. NETA Level 3 Exam
  (2 Viewing)
  
  Discuss the NETA Level III Certified ETT exam.
  Last post in
  Level III Questions, seen...
  
  by
  Wanderer20001us
  
  View Profile
  
  View Forum Posts
  
  View Articles
  
  4 Days Ago
3. NETA Level 4 Exam
  (1 Viewing)
  
  Discuss the NETA Level IV Senior ETT exam.
  Last post in
  New NETA 4 Exam Questions
  
  by
  tonybeavers
  
  View Profile
  
  View Forum Posts
  
  View Articles
  
  1 Week Ago

Test your knowledge in electrical testing and safety with tech quizzes from testguy. Featuring the largest collection of real world questions found anywhere on the web.

General Discussion Forum
1. News and Announcements
  
  Look here for special announcements and other news from the testguy team.
  Last post in
  Tech Quiz Updates for 2017
  
  by
  testguy
  
  View Profile
  
  View Forum Posts
  
  View Articles
  
  September 5, 2017

What's Going On?

Currently Active Users

There are currently 129 users online. 2 members and 127 guests

Most users ever online was 303, January 31, 2018 at 09:18 AM.

nicswes

TestGuy Statistics

Threads: 545
Posts: 2,227
Members: 9,972

Welcome to our newest member, tkrajewski63

Icon Legend

	Contains unread forum posts
	Contains no unread forum posts
	Forum is a category
	Forum is a Link

Follow Us

I was doing an infrared scan for an electrical contractor on a 120V 1200A distribution board, and as they were closing up the front cover, one of the panel...

So, I've been quizzed to answer this question. What is the basis for the 50V (30V) limit for de-energized work, and where do you find it written? I am...

A wye-delta transformer has a primary line voltage of 7200 V and a secondary line voltage of 480 V. What is the turns ratio? Your Answer: 15:1 Not sure...

Here are some recent questions from the Level 2, they were given to me by a co-worker who took the exam in October. 1. What connections are on a DLRO...

I've got a few questions I saw on the exam recently: 1: Which oil test is not required on silicone transformer oil? 2: What is the best way to test a...

i'm going april 27th anyone taken it this cycle already?

I’m not sure if you guys know, but every month Megger offers a free webinar. Once you sign up for one, you get notifications via email of the next upcoming...

I've got a few questions I saw on the exam recently: 1: Which oil test is not required on silicone transformer oil? 2: What is the best way to test a...

Had an interesting discussion on the job today about shorting together transformer windings when doing a PI test. Every technical manual I've come across tells...

Has anyone passed the level 2 since they changed it? If so, could you give some pointers as to what kind of material it covers/what to study? I'm taking it...

A wye-delta transformer has a primary line voltage of 7200 V and a secondary line voltage of 480 V. What is the turns ratio? Your Answer: 15:1 Not sure...

Here are some recent questions from the Level 2, they were given to me by a co-worker who took the exam in October. 1. What connections are on a DLRO...

What's Going On?

Currently Active Users

TestGuy Statistics

Icon Legend

Follow us

Explore TestGuy

NETA Certification Training

Help and Support