16 Best Socket Tester Units for Testing Power Socket Outlets
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Last updated on March 26th, 2020 at 07:23 am
Completing a project or building a product without actually testing it is definitely a recipe for a disaster. In almost all project development life cycles, testing is considered a very important phase at least before a product is released for use. The testing phase ensures that a product or a project meets the standards and requirements and is safe for use. In electrical engineering, electrical wiring is one of the projects where testing is critically important. Failure to test may result in damage of equipment, injuries, or even death. One of the areas where the test is normally conducted is on the power outlets. The test is performed using various tools, one of them being a socket tester.
What is a socket tester?
A socket tester is a plug-in electronic device designed to give a quick and easy indication of the condition of the socket outlet circuit. It is used by both skilled and unskilled persons to detect basic electrical faults on a standard wall socket as well as more modern outlets with USB ports. An outlet tester is also used to troubleshoot faults in an extension lead. Furthermore, vigilant home buyers use these socket testing devices to inspect the wall receptacles for safety and correctness of wiring before buying a house.
There are many proprietary socket testers in the market that vary in design and functionality. Based on their functionalities, receptacle testers are classified into three main categories: Simple, Advanced, and Professional. They are further classified according to the type of electrical outlet plug they are designed for. Globally, there are about 15 types of electrical socket plugs in use today. Each type is assigned a letter by the US Department of Commerce International Trade Administration from A to O. However, the most common power outlet standards in the market are the UK and US standards, which are types A&B and type G respectively.
Types of Power Socket Outlets and Plugs by Country Standard
1. US Power Socket (Types A and B)
Features of Type A power plug and socket
- Class II ungrounded plug
- Plug 2 flat parallel prongs.
- Prongs are polarised
- Plugs are polarised and can only be inserted one way.
- Rated 100V – 127V
- A socket has only two flat slots.
- Common standard in North and Central America
Features of Type B power plug and socket
- Class I grounded plug
- Plug 2 flat parallel prongs and a round or U-shaped earth pin.
- Earth pin is longer than the flat pins
- Plugs are polarised and can only be inserted one way.
- A socket has two flat slots and a round slot.
- For 100V – 127V ~AC
- Designated American standard.
2. UK Power outlet (Type G)
Features of Type G power socket and plug
- Plug has 3 rectangular prongs that form an isosceles triangle.
- Plug fitted with a 13A fuse.
- Receptacle has three rectangular holes
- For 220V – 240V ~AC
This article is a detailed review of the best UK and US socket testers. I have categorized them based on complexity of their features and the country socket standards.
Socket Tester Reviews by Functionality
As mentioned earlier in this article, socket testers are classified into three functional categories: simple, advanced, and professional. In the next few sections, we shall be exploring the features of each type as well as reviewing some of the best devices on the market.
Simple Socket Testers
A simple socket-outlet tester is a device designed to detect some of the basic electrical faults that might occur in the power outlet wiring. It is also considered as a tool for the first-line diagnosis of a power outlet wiring. Most simple socket testers have three LEDs to indicate the state of a socket wiring, and a reference menu to interpret the LEDs sequence. It can be used by skilled or unskilled persons to detect faulty wiring in a wall socket or an extension lead. However, the downside is that a simple outlet tester detects the absence of an earth fault but cannot measure the actual earth fault loop impedance at the socket outlet.
Advanced Socket Testers
This socket tester is designed to detect a wide range of faults including all those a simple socket tester detects. Besides testing the wiring of a wall socket, an advanced socket tester typically tests the earth loop impedance, RCD, and some even perform a polarity check. Earth loop impedance simply refers to the measure of the effectiveness of the protective earthing. An advanced socket-outlet tester displays either a range of numerical values into which the earth fault loop impedance falls. An electrician then interprets the range to determine if the socket outlet is grounded for safety. RCD check involves testing the functionality of an RCD installed in the premises. It sends a tripping current to safely trip an RCD in order to ensure that it will operate as required should there be an accident. For the US standard sockets, the RCD test current is 5mA and 30mA for the UK sockets. The polarity check feature enables checking of the possibility of there being a neutral/live(hot) swap at the mains supply where the supply enters the premises. An advanced socket tester is meant to be used by a skilled electrician who can interpret the outcomes of each test.Sperry Instruments GFI6302 GFCI Outlet Tester
Advantages
- The wiring legend printed in both sides makes ideal for use on upright and inverted sockets
- The rubber over-molded grips offer a comfortable grip
- It is durable and reliable
- Ideal for testing exterior outlets with covers
- Has a limited lifetime warranty
DIsadvantages
- The test button is so sensitive that the slightest stroke will cause it to test the GFCI
- The incandescent lights makes it difficult to tell if the light are on in a well lit room
- Only has visual indicators
- Contains a chemical known to the state of California to cause cancer and birth defects or other reproductive harm.
- Will not detect 2 hot wires in circuit
Sperry Instrument ManualMeterk GFCI MK16US Electric Socket Tester
Advantages
- Has 3 Bright LEDs are visible in a lit room
- The case has a reverse taper that makes this tool easier to plug in and out
- The front of unit has a graphic to explain the LEDs patterns
Disadvantages
- User manual is not easy to read
- Will not detect 2 hot wires in circuit
Amprobe ST-102B Receptacle Tester with GFCI
Advantages
- Meets safety regulations
- Has a manual written in English and Spanish
- Engineered to perform in a tough and professional environment
Disadvantages
- User manual is not easy to read
- The incandescent lights makes it difficult to tell if the light are on in a well lit room
- Only has visual indicators
- Will not indicate quality of ground resistance
- Will not detect 2 hot wires in circuit
- Will not detect a combination of defects
- Will not indicate reversal of grounded and grounding conductors
Tacklife EST01 Advanced GFCI Outlet Tester Power
Advantages
- 3 Bright LEDs that can be seen well in both a dark and a lit room
- Has a 2 year warranty cover
Disadvantages
- Not ideal for wall sockets with a ground at the bottom
- Only has visual indicators
- Its square shape makes it hard to test exterior outlets with exterior covers.
- The ground prong tends to come lose when a lot of force is used to push it into a socket outlet
- Will not detect 2 hot wires in circuit
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If you have a second… I wanted to ask you something though… Do you have an opinion on Milwaukee power tools? I just bought a house and I’m starting to collect some tools. Eagerly awaiting your reply. 🙂
Generally, Milwaukee has some of the most reliable tools in the market. You can check out how they compare with other tools in the reviews here