Torque Test Report

 

torque report

FHWA-OFFICE OF STRUCTURES CHECKLIST FOR STRUCTURAL STEEL BOLTING MILL TEST REPORT (MTR) 1. From steel producer on their form, not copied onto MCTR. 2. One report for each component 3. Report must contain the following: CHECKLIST FOR STRUCTURAL STEEL BOLTING PROCESS REVIEW OF PROJECT STATE. Torque Physics Lab Report. The purpose of this experiment was to help understand torque by not only measuring it but also by manipulating and adjusting the weights experimentally. The Torque Report. 8, likes · 75 talking about this. The Torque Report is your daily source of all the latest automotive news.


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The year: The place: Tucson, Arizona. As expected, by the end of the training session, torquing had not been discussed. Nervously, I walked to the microphone ready to face ridicule, but knowing how important it was not to miss this opportunity, torque report. When I explained that improper torquing was yet another cause of electrical fires and that my employer, Palo Alto, California, had been verifying torque for the past few years, as expected, torque report, there was laughter by several attendees.

Maybe this response was prompted by a lack of knowledge or comprehension of the importance of proper torquing, torque report. The response received on that day is, and no doubt will continue to be, repeated during electrical inspections, torque report. Do not let this response deter you from providing information, torque report. He was glad that I had brought up the subject, and he explained that connections sometimes vibrate loose during transport and that this situation is not verified in the field.

He also noted that customer complaints related to loose connections are not uncommon. As you can see, torquing is an issue, torque report, but it may not be talked about as often as necessary, torque report. My goal for this article is to answer some commonly asked questions, to address misconceptions, and to show that torquing the connections is perfectly natural.

The practice may not seem natural at first, but this crucial part of an electrical installation is not to be ignored. Loose connections may operate satisfactorily for a time, but eventually they will experience thermal runaway that will result in extremely high temperatures causing equipment damage andin some cases, structural fires.

Torque report have seen several instances of failures and fires that were confirmed to be caused by loose connections.

For many electricians, the idea of torquing terminations is a new concept, but the benefits are clear: safer torque report. Torquing is not new; in fact, automobile mechanics have been using torque tools for almost as long as they have been making cars.

It is usually in the form of a socket wrench with special internal mechanisms. It was designed to prevent overtightening bolts on water main and steam pipe repairs underground. There are likely electricians who have never seen a torque screwdriver or even know that these tools exist; some will not know where to purchase the tools. As electrical industry professionals, we need to be ready to provide information if the circumstance calls for it. Besides installing torque report according to the listing and labeling requirements as required by NEC After all, property owners may be paying premium prices and torque report want the benefit of each electron instead of losing energy that is dissipated at loose connections.

Fire prevention is another great reason to torque connections. When the conductors are not making good contact, torque report, this can create arcing, torque report, sparking and overheating, with the result being a fire.

When torquing, not only are we looking for loose connections but there may be some connections that are over tightened and now stripped, torque report. A stripped connection is not always evident by visual inspection only. You may notice a skewed setscrew or damaged setscrew on a mechanical lug, which could indicate a stripped connection. When breakers are stripped, there may torque report no obvious visual sign.

Both loose and overly tightened connections create a risk of failure. Neither equipment manufacturers nor industry standards recommend periodic retightening of connections. Additionally, cutting off the previously connected end of the wire and making the connection with an unused section of wire is the safest solution.

Often when I ask to see the torque wrench and torque screwdriver that was used, torque report, an Allen wrench set is what materializes. The Allen wrench seems to be the tool of choice, but this is not the right tool to complete the job.

Can you really torque by feel? Can you calibrate your arm? Having the right tools for the job is a good place to start; otherwise, torque report, you may be setting yourself up for failure, torque report. To start with, every electrician must have a torque wrench. An inch-pound torque wrench will be required, and depending on the job, a foot-pound torque wrench may be required.

For a residential amp service panel, a foot-pound torque wrench may not be required, torque report. The highest torque value for a amp service panel usually is around inch-pounds. These connections are for the service-entrance conductor SEC terminations with an Allen set screw termination.

A foot-pound torque wrench will have the higher ranges needed to achieve values higher than inch-pounds and will be required for service equipment over amps. Smaller service equipment, such as amps with smaller service-entrance conductors, will likely terminate at a smaller mechanical lug with a slotted setscrew.

A good rule of thumb to keep in mind is that the torque value for torque report slotted setscrew is not over 50 inch-pounds. The hex socket set will be used torque report the Allen setscrew found at service-entrance mechanical lugs, and at larger breakers typically found in commercial switchgear and panelboards. This is where your deep socket hex set will come into play. The setscrew on these larger breakers is set back within the breaker some three inches and the standard hex socket will not fit even with an extension.

Torque report openings to access these recessed terminations are very minimal. Channellocks or similar pliers must be used to back up torque report hold mechanical lugs in place while the proper torque is being applied, torque report.

The means by which the mechanical lug has been attached to the equipment may not have been tested to withstand the same torque as the lug and, therefore, must be securely held in order to avoid damaging the equipment. Damaged equipment torque report additional costs and time delays that could torque report been prevented. These lugs are located either at the top or the bottom of the bar. If securing the lug while torquing is not taken into consideration, it is likely that the bus will split.

If you notice that the torque report is starting to bend while torquing, a better hold of the mechanical lug is required, or you will have damaged equipment to replace. Torque seal is used by manufacturers at the factory and by electricians for field connections, torque report. It is usually packaged in poly squeeze tubes and is available in an array of colors. Torque torque report is a good method to confirm which connections have already been torqued.

Note: torque seal is not a substitute for using the right tool! It should only be applied after tightening the connection to the proper value. A torque screwdriver is not a regular screwdriver, torque report, but is very similar, torque report.

Torque report torque screwdriver can be used to tighten and loosen screw connections, torque report, but its primary function is to tighten torque connections to a specific value. A torque screwdriver will have adjustable torque settings in increments of 1, torque report, 5 or 10 inch-pounds with a range between 5 and inch-pounds.

A torque screwdriver is used in a straightforward motion by twisting the handle. A torque-limiting clutch is built in, torque report, so that the screwdriver will disengage when the preset torque has been reached.

Unlike the torque screwdriver, the torque wrench uses a lever action. The levered action of a torque wrench provides an easier way to apply a higher torque value. Users should be aware that there are usually two torque values given on each side of the torque wrench handle, torque report. On one side of the handle, torque report, the values are given torque report newton-meters and on the other side of the handle the values are given in inch-pounds or foot-pounds.

Both can be hard to read because they are etched into shiny metal. See photo 6. Torque report sure you are looking at the right values before you start, torque report, or you may be applying a higher torque than what is called out, thereby causing damage to the equipment.

The lines next to the torque value are not always straight across and can be misread. Applying excessive torque can also strip out the lug. Always double check the values specified by the manufacturer of the equipment and the adjusted values on the torquing device. Always use the torque value provided by the manufacturer, when available. Newer equipment will always have the torque values provided, but you may have to hunt for them at times.

Torque values for terminals within the enclosure can be found on labels on the inside of the cover, the dead front or elsewhere in torque report enclosure. Torque values for circuit breakers are not found on the equipment label. These values will be on the breaker, not on the enclosure. See photo 4.

This information can be found in different locations depending on the manufacturer, torque report. For example, the Square D breakers will have the torque values embossed on the side of the breaker whereas Murray breakers will have the information printed on the face of the breaker.

One of the downsides to having the information on the side of the breaker is that you may have to torque report the breaker to read the values. Or maybe the electrician has a spare breaker on the truck that will allow you to verify the values without removing the installed breaker.

You may also need to bring a magnifying glass or someone with young eyes when looking for the torque values on breakers. This information can be very difficult to read due to the very small font size used. Where there is no torque value available — which is often the case for older equipment and breakers — default torque values can be found in the National Electrical Code Handbook after section If an inspector questions what authority he or she has to implement verification of proper torque, the Code is there to back you up, torque report.

Section This requirement includes verifying the given torque setting. Not only do we have the authority, but it is also our obligation as inspectors to ensure life safety. An example of a torque inspection policy from Santa Ana, California is included in Exhibit 1. Before you start implementing this in your jurisdiction, make sure that you have the support of the Building Official. When the Building Official authorizes torque report to move forward, torque report, you torque report the educator for the electricians and general contractors.

You may need to tell them what tools they will need and where they can purchase them. They may need direction in locating the torque report values, and you may need to help them to read the torque values on their torque tools. All field connections must be tightened using appropriate torque tools. The connections that should be torqued in the field normally consist of bolts, connectors and terminals including the following items:.

 

Quality Control Forms

 

torque report

 

Torque Physics Lab Report. The purpose of this experiment was to help understand torque by not only measuring it but also by manipulating and adjusting the weights experimentally. The daily source for all the latest automotive news, new car debuts and reviews. 52 Experiment 9: Torques and Rotational Motion PROCEDURE PART 1: Quantitative Analysis of Torque 1. Place the knife-edge clamp at the 50 cm position of .