Electrical Drafting

[noochstyle]

I was wondering if anyone could recommend a good book for electrical engineering drafting conventions. I have been taking alot of heat lately for my drawings not being up to bar. I have been out of school for two years and unfortunately the last 14 months I have been the only electrical at my company so no one is around who can show me conventions and symbols and all that fun stuff that is usually passed down bya mentour. So a good book/website anything that will help me learn some drafting conventions and the correct ways to depict the engineering correctly. I am doing mainly Electrical Distribution (and branch circuiting) and Fire Alarm. I do from time to time get involved with the telephone and data, security, and A/V work as well.

Any help is greatly apprciated!

Thank you,
John

 

[bbaumer]

If you are using AutoCad I can send you some samples.

 

[noochstyle]

That would be great, ou have 101 sheets. My question right now is when I have a motor below 1/8HP I know I don't need a disconnect, should I just show a junction box with homerun or just a box to represent the equipment or a motor symbol. This is in plan view.

I just set it so I can recieve emails from other members, if you want to send them that way. Or else john.marinacci@gmail.com works for me.

 

[DanZ]

John,

Your email address will probably get removed. Moderators don't like leaving those in here. I think you can change your settings by clicking on the "My Profile" link on the upper right (you have to be logged in) than click "options and scroll down. The first one is a vcard containing your contact info, and farther down, you can set it to send you an email notifying you that you got a PM.

As far as drafting, Ugly's Electrical References is a good book for electrical symbols and calcs.

To build your library, and your knowledge, if you have an electrician or two you do a lot of work with, you can ask them if they can give you any good example drawings they have. You can also mention that if there's anything you can do to make your drawings better, or easier for them (like line/pen weights) to use, all they have to do is let you know.

For your motor, I think I would show a motor symbol with a homerun, unless you are planning on going into a junction before the motor, than I would show the junction. Otherwise, I would leave it up to the electrician.

 

[weressl]

I was wondering if anyone could recommend a good book for electrical engineering drafting conventions. I have been taking alot of heat lately for my drawings not being up to bar. I have been out of school for two years and unfortunately the last 14 months I have been the only electrical at my company so no one is around who can show me conventions and symbols and all that fun stuff that is usually passed down bya mentour. So a good book/website anything that will help me learn some drafting conventions and the correct ways to depict the engineering correctly. I am doing mainly Electrical Distribution (and branch circuiting) and Fire Alarm. I do from time to time get involved with the telephone and data, security, and A/V work as well.

Any help is greatly apprciated!

Thank you,
John

Electrical symbols are defined by IEEE 315-1975(1993)/ANSI Y32.2-1975(1989). (453 pages)

 

[nakulak]

http://global.ihs.com/search_res.cfm?currency_code=USD&customer_id=21254D51350A&shopping_cart_id=2824583B2C4A402C49595D382B0A&rid=Z06&mid=Z94&country_code=US&lang_code=ENGL&input_doc_number=ieee%20315&org_code=IEEE

 

[cadpoint]

... My question right now is when I have a motor below 1/8HP I know I don't need a disconnect, should I just show a junction box with homerun or just a box to represent the equipment or a motor symbol. This is in plan view.

A snap switch can be used with this size service. I believe all motors are required to have a means of disconnect, the snap switch qualifies as one and needs to be motor rated for larger sizes motors.

Switches,
Disconnecting means
Appliances 422-111
motor, controller, 430-IX
services,230-VI

The disconnect means should be shown in-line to the circuit and most motors have the HP inside a circle with angled lines off of the circle similar to a hurricane symbol.

I don't know if that is to IEEE reg's.

 

[bbaumer]

A snap switch can be used with this size service. I believe all motors are required to have a means of disconnect, the snap switch qualifies as one and needs to be motor rated for larger sizes motors.

Switches,
Disconnecting means
Appliances 422-111
motor, controller, 430-IX
services,230-VI

The disconnect means should be shown in-line to the circuit and most motors have the HP inside a circle with angled lines off of the circle similar to a hurricane symbol.

I don't know if that is to IEEE reg's.

Correct. I usually show a manual motor starter.

 

[bbaumer]

By the way, I sent you two sample projects drawn to two different standards this morning. One fairly large and one small.