Panel Schedules in Excel Format: Probably our most popular download. This is a zip file of two Excel Panel Spreadsheet templates. One is for 1-phase panels and the other is for 3-phase panels. These spreadsheets are rather complex as they preform NEC style calculations of the loads as you enter them and assign them categories. These spreadsheets also allow you to link them to one another so that one sub-feeds another. To do this, the spreadsheets have numerous macros which have been digitally signed. There is a tab on each spreadsheet with three pages of instructions. Last Updated 7/19/2017 (522KB)

1Ø Panel Schedule in PDF: This is a PDF version of the single phase panel schedule so that you can easily use it in the field to survey a panel. You could get almost the same thing by printing the first tab of our 1-ph panel schedule but this version is a little cleaner. (68.7KB)

3Ø Panel Schedule in PDF: This is a PDF version of the three phase panel schedule so that you can easily use it in the field to survey a panel. You could get almost the same thing by printing the first tab of our 3-ph panel schedule but this version is a little cleaner. (73.5KB)

Feeder Calculator in Excel: This is a zipped Excel template spreadsheet that will calculate the minimum sized conduit needed to hold the conductors that you select. Programs and apps to size conduit are nothing new and you may even have one yourself. This one is particularly slick because you can designate the insulation of each conductor and pick almost any type of conduit via drop down lists. (63.8KB)

Residential Service Calculator in Excel: This is a zipped Excel template spreadsheet that helps you to calculate the electrical service for a single residence using the optional method found at 220.82 in the NEC. It has an instruction tab to guide you in its use. When completed, the calculation can be printed and is suitable to submit to an AHJ. Watch this page for a new tool that we have in development for calculating the electrical service load for apartment buildings. (51KB)

CAD Scale Chart in PDF: This is a handy chart for anyone that works with CAD. It helps you to determine what scale to pick for a drawing by showing the dimensions of each size drawing sheet at various architectural and civil scales. It also indicates how tall text needs to be at each scale in order to display at a variety of sizes. (45.3KB)

Feeder Tables in PDF: Electricians and electrical engineers routinely need to determine the correct raceway, conductor, and equipment ground for a circuit or feeder. We typically do this by looking up an ampacity of a conductor in Table 310.15(B)(16) of the NEC, match it up with an equipment ground from Table 250.122, then calculate the proper size raceway using the rules and figures found in Chapter 9. However, if you're willing to adhere to some standard rules, there's no reason to do this each and every time. A 4-wire 300A feeder using THW copper conductors in EMT will always be the same right? These feeder tables are pre-calculated tables for various ampacities or motors following some general guidelines. Read thru the instruction page and, if you agree with the design guidelines and accept that they make for a good basis of design, then these tables can save you a great deal of time and avoid costly errors. (169KB)

As Built Chart in PDF: Have you ever been at loss as to where you are in a design project? Refer to this chart to locate which phase of a project you are at. Don't get too excited — it's just a joke chart. (48.1KB)

Working Together as a Team with CAD: This document outlines several CAD standards that can help a team of designers from different firms or disciplines be able to use one another's files with some degree of unity and ease.

What's Next?

We plan to improve the panel spreadsheets to accept panels larger than 42 circuits now that the big manufacturers are offering them. The next generation of our panel spreadsheets will allow these larger panel sizes and also incorporate the ability to designate single and double sub-feed breakers. We are also in the process of developing a spreadsheet that will calculate the NEC load for an apartment building. If you have ideas or needs, please write to us and share your ideas or wish lists.