How do you choose strain relief?
When looking at the correct style strain relief, find the ones that have the correct thread size or mounting hole size. Then look at the cable diameter specification range and choose the one that has the best fit. Ideally, the cable diameter should be towards the top end of the cable range for the strain relief chosen.
What is strain relief test?
3-3-18. Understanding the Strain Relief Tests. The “Understanding the Product Safety Tests” Series. The Strain Relief Test is conducted on products that have an electrical cord or cable permanently attached to the product. This includes power cords, output cords, jumper cables, daisy chain cables, etc.
What is strain relief on electrical connection?
The strain relief, as the name suggests, relieves a cable of stresses and tensions that could break the conductor inside or the connection between the plug or connector and the cable. It is an essential feature for the mechanical and electrical integrity and overall performance of all types of electrical cables.
What is strain relief in construction?
Strain Relief Technology Strain relief components provide protection and relief from the stresses of wire and cable connections and prevent the connections or cables from breaking. This feature is essential for mechanical and electrical connectors.
Is a strain relief necessary?
When a power cord is connected to terminals inside the appliance, the point where the cord penetrates the shell of the appliance needs to have a strain relief clamp, also sometimes called a cord connector, as a securing device.
What is cord anchorage test?
Immediately after the IEC 60884-1 section 23 cord anchorage test, a twist test is conducted. For this test, most 3 conductor cords are subjected to 0.25Nm of force for one minute. After the test, the cord shall not be displaced more than 2mm.
What is the OSHA standard for extension cords?
OSHA standards allow the use of an extension cord for a maximum of 90 days. If you need the cord longer than that, you’re required to create a more permanent solution and hardwire whatever you’re plugging in.
What are the two types of grounds that are required by OSHA?
Grounding
- System or Service Ground: In this type of ground, a wire called “the neutral conductor” is grounded at the transformer, and again at the service entrance to the building.
- Equipment Ground: This is intended to offer enhanced protection to the workers themselves.
Do you have to use a strain relief on dryer?
Yes, for legality and safety. Dryers in particular move a lot, and you don’t want your conductors wearing through on the sharp edges of the chassis and electrifying the entire unit or starting a fire.
Do you have to have strain relief on dryer?
A cord strain relief is required to prevent accidental pulled from the unit. You will notice a black white and red wire connected to the terminal block and a white ground wire connected on the green screw mount.
What is a strain relief test?
The Strain Relief Test is conducted on products that have an electrical cord or cable permanentlyattached to the product. This includes power cords, output cords, jumper cables, daisy chain cables, etc. These tests involve
What are the different types of strain relief fittings?
Strain Relief Fittings – Technical Information 1 PG Thread = Panzer-Gewinde (also Panzer-Rohr-Gewinde) 2 German thread type 3 Depth of thread smaller than NPT or Metric, but larger flank angle 4 BSPP Thread = British Standard Pipe Parallel Thread 5 Parallel (straight) thread with a constant diameter, denoted by the letter G
What are the different types of compression strain relief bushing?
Compression strain relief bushing types While often used for small or flat electrical cords, there are compression plastic strain relief bushing and grommet styles that are simple to install. In electronic equipment, they absorb push, pull, and twisting forces that the cord may be subjected to during use.
What is the difference between UL listed and UL recognized?
UL recognition is also not as rigid in its industry standards and is, therefore, easier for a business to attain as a result. UL Recognized certification can be applied to any component part, or even to barrier materials. If you want to get the UL logo on your stand-alone products, you must get a UL Listed seal of approval.