John, good question I vaguely remember it being raised way back when I attended NEC Training Seminars. Best I recall it was explained (By Mike Holt or Joe Mc Partland NEC board members and experts) we were to: First calculate the maximum continuous current,,,,,,,,,Then size conductors to have a minimum ampacity of 125% greater,,,,,,,,,,,,,THEN WE SIZED THE OVER CURRENT PROTECTION DEVICE TO PROTECT THE CONDUCTORS (not so much the devices). Other factors we took into account were diversity and using multiple devices on a single branch circuit. In that situation there might be a 20 amp branch circuit using 12 Gauge 20 amp rated wire protected by a 20 amp circuit breaker while if there were say four devices each may only draw 3 or 4 amps SO MORE THEN ONE 15 AMP RECEPTACLES WERE STILL PERMITTED on that 20 amp branch circuit.
As a practical matter when I practiced power distribution I may have specified 120 Volt 15 Amp NEMA 5-15R Duplex Receptacles on 20 amp branch circuits in residential BUTTTTTTTTTT in Commercial and Industrial applications if I used a 20 amp branch circuit I only used 20 amp NEMA 5-20R receptacles or switches.
As always, where fire and life safety is concerned consult current practicing professional engineers (NOT me I'm retired) and electricians, the NEC and any local authority and don't bet your home or life on lay opinions on a tractor forum.
Upload one or more videos to your post. Photo and video filesizes should be less than 5MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Trenching With a Plow - by Staff. Introduction: This interesting information came from one of the discussion forums here at YT. We thought we should place it up front so it could be read by anyone interested in putting old iron to work. [Editor] I tried something new today, and it worked so well I thought I should post it - in case it might help someone else. I'm running 100 yards of 4" drain pipe from the gutter downspouts of our house to a pond down the hill. This should hel
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
