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Thread: Resistor Value in Journeyman Exam

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    Resistor Value in Journeyman Exam

    I am new to this forum and apologize if I am not doing right.

    If there is resistor color bands question in the Journeyman exam, if there is a reference info in NEC or American Electricians' Handbook? Or, we need to momorize this?

    Thx!

    Jay

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    It's not in the NEC. I don't know about the handbook to which you refer. I still remember the color code; my oldest brother taught it to me over 50 years ago. I can't publish the mnemonic that he told me, in order to help me remember it. It's not polite. (Note: After I posted this, I noticed that another member posted that mnemonic. I had to delete it.)

    There is a "softer" version, but I don't know that one.

    Here is the sequence:
    Black, Brown, Red, Orange, Yellow, Green, Blue, Violet, Gray, White, Gold, Silver.

    Welcome to the forum.
    Charles E. Beck, P.E., Seattle
    Comments based on 2017 NEC unless otherwise noted.

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    Better Be Right Or Your Great Big Venture Goes West

    https://1technation.com/better-be-ri...ure-goes-west/
    The more they overthink the plumbing, the easier it is to stop up the drain

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    If you're not allowed to use a reference page, you'll just have to memorize it.
    "Red, Orange, Yellow, Green, Blue, Violet" are the colors of the rainbow, in their usual sequence, which you've probably already learned in another context.

    But would this even come up on an electrician's exam? It's something electronic technicians use, but electricians never deal with resistors so small that they color striping is required. Everything electricians deal with will be large enough to be labeled with Arabic numerals, unless I'm missing something?

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    Quote Originally Posted by charlie b View Post
    There is a "softer" version, but I don't know that one.

    Here is the sequence:
    Black, Brown, Red, Orange, Yellow, Green, Blue, Violet, Gray, White, Gold, Silver.
    From Popular Science or Popular Mechanics, years ago:

    Bachelor Boys Rush Our Young Girls But Veronica Goes Wild (only for) Silver (and) Gold

    Black=0 Brown=1 Red=2 Orange=3 Yellow=4 Green=5 Blue=6 Violet=7 Gray=8 White=9 Silver=10% tolerance Gold=5% tolerance

    The important thing to remember is that the numbers -=START=- with zero, and count up.

    There's a nice picture at http://www.resistorguide.com/resistor-color-code/

    They also have another mnemonic: Bad Beer Rots Our Young Guts But Vodka Goes Well; Get Some Now!

    Traditionally, you have 2 digits for numbers, 3rd digit is the multiplier ("x10^^n"), and a 4th band for tolerance.

    Tolerance is the accuracy of the resistor-- no band, the value can be +/- 20% of the value in the 1st 3 bands. Silver-- +/- 10%, and Gold-- +/- 5%.

    There are also resistors with more bands for the digits-- 3 digits, 1 multiplier, 1 for Tolerance (which has expanded to include other percentages), 1 for temperature coefficient.

    See the link above.

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    Thanks all for your quick reply and info. It is exteremely helpful.

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    Quote Originally Posted by charlie b View Post
    It's not in the NEC. I don't know about the handbook to which you refer. I still remember the color code; my oldest brother taught it to me over 50 years ago. I can't publish the mnemonic that he told me, in order to help me remember it. It's not polite. (Note: After I posted this, I noticed that another member posted that mnemonic. I had to delete it.)

    There is a "softer" version, but I don't know that one.

    Here is the sequence:
    Black, Brown, Red, Orange, Yellow, Green, Blue, Violet, Gray, White, Gold, Silver.

    Welcome to the forum.
    Ha, I was going to post the same thing. We just talked about this at work the other day, I asked my fresh out of the Navy guy about the one I was taught and he laughed and said no way would that fly these days.

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    Quote Originally Posted by zog View Post
    Ha, I was going to post the same thing. We just talked about this at work the other day, I asked my fresh out of the Navy guy about the one I was taught and he laughed and said no way would that fly these days.
    If it's the one I know, it's racist and misogynistic, plus it leaves out the tolerance percentages! (:

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    Quote Originally Posted by charlie b View Post
    It's not in the NEC. I don't know about the handbook to which you refer. I still remember the color code; my oldest brother taught it to me over 50 years ago. I can't publish the mnemonic that he told me, in order to help me remember it. It's not polite. (Note: After I posted this, I noticed that another member posted that mnemonic. I had to delete it.)

    There is a "softer" version, but I don't know that one.

    Here is the sequence:
    Black, Brown, Red, Orange, Yellow, Green, Blue, Violet, Gray, White, Gold, Silver.

    Welcome to the forum.
    That chick Violet, she’s a hoe



    Bad Boys ____ our young girls but Violet gives willingly.

    Gold and silver are tolerances gold is 5% tolerance, silver is 10% tolerance and no band is 20% tolerance.

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    There's a Wikipedia page on resistor color code mnemonics. It even has all the offensive ones!
    Ethan Brush - East West Electric. NY, WA. MA

    "You can't generalize"

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