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I've met sparkies I know don't know a hypotenuse from a rhombus....so give me some examples

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Joined

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4,623 Posts

I've met sparkies I know don't know a hypotenuse from a rhombus....so give me some examples

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273 Posts

Last I checked (which was probably around 40 to 50 years ago) "hypotenuse" and "rhombus" were terms from Euclidean geometry not algebra.I've met sparkies I know don't know a hypotenuse from a rhombus....so give me some examples

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16,993 Posts

Sparkies have to know Ugly's. That is all.Last I checked (which was probably around 40 to 50 years ago) "hypotenuse" and "rhombus" were terms from Euclidean geometry not algebra.

Carry on.

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4,455 Posts

Knowing algerbra is the engineer's job.

But if he had to do it your way it might take him longer than you took.the builder did it in one tenth the time with his framing square.. LOL

These aids can make someone mentally lazy.

When you have the chance, push yourself to beat his time.

And think of situations where his square cannot help him. You may find threads on this forum that ask for help for this very reason.

Geometry is the equations and formulas, expressed using algebra.

Sorry, that's the best I can do on that.

As for why Electrigicians need it?:

Conduit bending

Ohms law

Combination R-L-C circuits, where voltage and current are out of phase with each other

Wire size calculations

Conduit size calculations

Motor load calculations

General load calcs

Transformer calcs and sizing

Circuit testing

I could go on, but I'm getting bored.

Delta

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273 Posts

Algebra was brought into geometry (assumed), by Rene Descartes. He was born in almost the sixteenth century, AD.

So, electricians do need to know algebra, but their command of geometry could be almost nil.

So, that's why many electricians may not know the difference between a hypotenuse and a rhombus.

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9,828 Posts

I know machinists that can get out Machinery's Handbook and calculate how to cut spiral helix gears....some awesome trig at work, and these same guys could not pass algebra 1 in high school.

The math used in flying (as a pilot) can be challenging, but again, you can learn some pretty advanced stuff and never learn the basics behind it. It has worked well for years.

Once electricians use delta formulas, like ohms law, and the P*I*E stuff, then the rest can all be covered by tables and experience.

You don't need to know everything, you just need to know where to look it up and how to apply it.Then you have to go to the book

And derive the formulas yourself, if you can.

My new favorite response when fixing the electrical installations of handymen and carpenters applies here:I've met sparkies I know don't know a hypotenuse from a rhombus....so give me some examples

In this area you can't enter the program without passing an algebra test. Many of the guys on sites are laborers. They know how to set boxes, drill holes and pull wires, but not much else.

That is true around here too. Most of the guys running wire, conduit and mounting boxes don't know algebra and barely know simple arithmetic. The foreman knows how to measure, subtract, add and divide, but that's about it too. Back at the office or headquarters they have an engineer that figures all the tough stuff out like algebra, trigonometry and geometry....he's the one that writes out the scope of work and procedures for everyone else.My new favorite response when fixing the electrical installations of handymen and carpenters applies here:

This is something an apprentice learns in the first year.

In this area you can't enter the program without passing an algebra test. Many of the guys on sites are laborers. They know how to set boxes, drill holes and pull wires, but not much else.

As for me, I have to know all this stuff (algebra, geometry and trigonometry), plus physics, engineering, accounting, management and so forth.

You can still be a good electrician and not know geometry or complex algebra. Myself, I took calc 3, linear algebra, differential equation and I quit my math major when I was supposed to take abstract algebra. Linear algebra and differential equations was abstract enough for me. Never needed it.

Pipe work (concentric bends, segmented bends, basic offsets etc).

Lighting layout

Ohms law equations

The ability to build things (electric room installs, switch yards, etc) that are plumb level and square. :whistling

I dunno. Numerous tasks. If we didn't have math we would all be pushing a broom, no offense.

Most basic tasks required math in construction. Most formulas use algebra. I like my wires cool and pipes looking good. :thumbup:

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