Summer is here and so is our newsletter! Featured in this issue are several items related to overcurrent protection as well as a business article about online calculators.
We're having a Sticker Contest! Win $50 for putting up a JADE Learning sticker! See sidebar for details.
If you would like to share an experience, idea, or installation tip with other electrical professionals, please email us at: newsletter@jadelearning.com .
David Burtt, JADE Learning
Internet Calculators Make Some Decisions Easy by Stephen Pape
Today there are many sources of business calculators that can be used to simplify basic business calculations. Use this free online calculator to find out if you qualify for a business loan before you visit your local banker.
Click here to watch a video by Ferraz Shawmut about the electromagnetic forces unleashed during a short circuit. By cutting off the fault current before it reaches the maximum value, a current limiting fuse can prevent damage to conductors and equipment.
Selecting Overcurrent Protection Calculator
Click here to calculate the minimum wire size and the maximum permitted overcurrent protection size for selected loads. Enter load values rounded to the nearest whole number. The maximum overcurrent protection allowed for motors, tap conductors, transformer secondaries and several other types of specialty loads will be different. The calculator is based on the highest value the National Electrical Code will allow from Section 240.4. Overcurrent protection can always be reduced in size to match the load.
Question of the Season
A 1/0 AWG conductor can carry 150 amps. If it is installed in a raceway with 3 other current-carrying conductors it must be derated to 80% of its current-carrying capacity. What is the maximum size of the overcurrent protection allowed?
a.) 100 amps
b.) 110 amps
c.) 125 amps
d.) 150 amps
Know the answer? Email us at: newsletter@jadelearning.com. The first two people to respond with the correct answer and their name and mailing address will receive a prize from JADE Learning.
Washington Licensees
Click here to see how many continuing education credits you currently have.
Already completed your continuing education and ready to renew? Click here to renew your license online.
Two bills were proposed this legislative session that directly impact the Washington Electrical Program.
HB 2555 passed both the House and Senate and allows the Electrical Program to issue subpoenas when requested information is not provided.
HB 2546 passed both the House and Senate and raises the requirements for trainees' classroom training to 48 hours per renewal period. This requirement is to be phased in. To renew on or after July 1, 2011, trainees must have 32 hours of classroom training. To renew on or after July 1, 2013, they must have 48 hours.
We are currently running a sticker contest with a prize of $50.00 cash being awarded each month. All you have to do is take a picture of wherever you've put your sticker and send it to us.
Need a sticker? Click here and fill out the contact form to request one, or call us at 1-800-443-5233.
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