carl425 I would never tolerate benchwork that would move under the force required to insert or remove a plug from a receptacle.
I would never tolerate benchwork that would move under the force required to insert or remove a plug from a receptacle.
+1
Sturdy work boxes (metal or plastic) secured to solid benchwork, grounded 3-plug duplex outlets, metal or plastic cover plates, solid copper wire, romex or other modern sheathing, approved wire staples and/or clamps, sensible attention to electric loading and daisy chaining, cable routing noted and known so that future construction will not puncture romex with screws or nails or sawzall . . . should be no big concerns to a serious model railroader and should be safe when the grandkids are around.
If the local building inspector gets involved, the easiest way to win an argument with him would be to do exactly as he instructs.
Good luck.
Robert
LINK to SNSR Blog
Lived in a town once that BX was illegal and lived in a city where romex was not allowed.
ATLANTIC CENTRAL SouthPenn Duplex receptacles are rated at 1.5 amp for calculating how many you can have on one breaker. A 15 amp breaker can have 10 duplex receptacles on it. Something that is plugged into a receptacle is not counted. But with your multiple outlets on a plug, it would be a judgment call by the inspector. Most would consider it an extension cord. If you use Wiremold and it is hard-wired into the circuit, then it is counted. WRONG, we just went through this in another thread, "power for new layout room". While state and local goverments can and do create their own exceptions, the foundation is all based on the NEC. NOTHING in the NEC limits the number of receptacles on a 15 amp or 20 amp circuit breaker. The limitation is how many square feet of the building each circuit can supply with general power. Go to that thread and read what I posted, then go find a copy of the NEC and learn it before you go giving advice. In that thread I posted the applicable NEC articles, you can look it up. Sheldon
SouthPenn Duplex receptacles are rated at 1.5 amp for calculating how many you can have on one breaker. A 15 amp breaker can have 10 duplex receptacles on it. Something that is plugged into a receptacle is not counted. But with your multiple outlets on a plug, it would be a judgment call by the inspector. Most would consider it an extension cord. If you use Wiremold and it is hard-wired into the circuit, then it is counted.
Duplex receptacles are rated at 1.5 amp for calculating how many you can have on one breaker. A 15 amp breaker can have 10 duplex receptacles on it. Something that is plugged into a receptacle is not counted. But with your multiple outlets on a plug, it would be a judgment call by the inspector. Most would consider it an extension cord. If you use Wiremold and it is hard-wired into the circuit, then it is counted.
WRONG, we just went through this in another thread, "power for new layout room".
While state and local goverments can and do create their own exceptions, the foundation is all based on the NEC.
NOTHING in the NEC limits the number of receptacles on a 15 amp or 20 amp circuit breaker. The limitation is how many square feet of the building each circuit can supply with general power.
Go to that thread and read what I posted, then go find a copy of the NEC and learn it before you go giving advice. In that thread I posted the applicable NEC articles, you can look it up.
Sheldon
If you read article 210.11 in the NEC it tells you that required circuits must be provided to supply the calculated load. It says absolutely nothing about how many square feet a circuit a residential circuit may supply. (It DOES tell you provided receptacles in a public or commercial building must be accounted for((which limits the number of receptacles on a circuit)) but, again, does not tell you how many Sq Ft the circuit may serve)
The 3 VA/Sq Ft figure is used to calculate the electric service size. Some local jurisdictions choose to apply the 3 VA/Sq Ft to what a circuit may supply but the NEC doesn't.
IF you sit down and do a load calculation for the general lighting requirements (and no other loads) in a 2000 Sq. Ft. house, you'd find it is less than 20 AMPs. Not reasonable, but 2 15 AMP circuits can handle this. (1st 3000 VA at 100%, 2nd 3000 VA at 35%)
I won't argue the point. Get on any electrical forum where pros participate and tell them there is a sq ft limit on a resi circuit set by the NEC- - then stand back.
I really think the moderators need to decide this stuff isn't fodder for their forums and close the threads with advice to seek professional guidance. JMVHO
SouthPennAnd working in government-owned buildings was like working on another planet. They had their own way of doing things. Even the local townships have their own rules.
.
Pfffffft!
All this seems simple when compared to trying to make a workshop compliant for servicing Compressed Natural Gas powered vehicles.
Now there is where you will run into some crazy rules!
-Kevin
Living the dream.
Atchee ATLANTIC CENTRAL SouthPenn Duplex receptacles are rated at 1.5 amp for calculating how many you can have on one breaker. A 15 amp breaker can have 10 duplex receptacles on it. Something that is plugged into a receptacle is not counted. But with your multiple outlets on a plug, it would be a judgment call by the inspector. Most would consider it an extension cord. If you use Wiremold and it is hard-wired into the circuit, then it is counted. WRONG, we just went through this in another thread, "power for new layout room". While state and local goverments can and do create their own exceptions, the foundation is all based on the NEC. NOTHING in the NEC limits the number of receptacles on a 15 amp or 20 amp circuit breaker. The limitation is how many square feet of the building each circuit can supply with general power. Go to that thread and read what I posted, then go find a copy of the NEC and learn it before you go giving advice. In that thread I posted the applicable NEC articles, you can look it up. Sheldon If you read article 210.11 in the NEC it tells you that required circuits must be provided to supply the calculated load. It says absolutely nothing about how many square feet a circuit a residential circuit may supply. (It DOES tell you provided receptacles in a public or commercial building must be accounted for((which limits the number of receptacles on a circuit)) but, again, does not tell you how many Sq Ft the circuit may serve) The 3 VA/Sq Ft figure is used to calculate the electric service size. Some local jurisdictions choose to apply the 3 VA/Sq Ft to what a circuit may supply but the NEC doesn't. IF you sit down and do a load calculation for the general lighting requirements (and no other loads) in a 2000 Sq. Ft. house, you'd find it is less than 20 AMPs. Not reasonable, but 2 15 AMP circuits can handle this. (1st 3000 VA at 100%, 2nd 3000 VA at 35%) I won't argue the point. Get on any electrical forum where pros participate and tell them there is a sq ft limit on a resi circuit set by the NEC- - then stand back. I really think the moderators need to decide this stuff isn't fodder for their forums and close the threads with advice to seek professional guidance. JMVHO
If it was only that simple.
The code requires a long list of calulated load circuits in residences. But in addition to those special circuits (bathrooms, kitchens, fixed appliances, etc) it allows the general lighting and receptacle load to be figured at 3 VA per sq ft.
And again, there is nothing in the code to prevent me from putting more than 10 receptacles on a general receptacle circuit, as several people have suggested in both of these threads.
As per the example I used in the other thread, two or three average bedrooms in any average house can be on one 15 amp or 20 amp general lighting/receptacle circuit, and there will most surely be more than 10 receptacles on that circuit based on the required spacing/wall coverage rules. Why? Because that circuit needs only to be calulated based on the 3 VA per sq ft load.
Article 220 is titled "Branch-Circuit, Feeder, and Service Calculations", because it applies to calculating all three, not just the service size.
And the part of 210.11 you left out says "in accordance with 220.3" the very section of the code I quoted.
And again, 220.3 (10) spells out clearly that residential general use outlets (and by extension the circuit that feeds them) are subject to the 3 VA load caluclation and I quote "No additional load calculations shall be required for such outlets".
So you need to suppy 3 VA per square feet of general lighting and receptacle power. A 15 amp circuit is 1800 VA, how many squre feet can it serve? 600
The de-rating of part of the load that you quoted applies to the service/feeder size for the building........