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Constructor 12 Electrical Ladder Diagram, Schematic and PLC Software
Constructor 12 Electrical Ladder Diagram, Schematic and PLC Software

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades - Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc.

ECN Forum

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Re: derating rooftop conductors
Posted by Tesla:
The sole and only reason for that column IS derating.

For there are no 90 degree rated devices out there.

One then uses the lesser computed ampacity limit.

So, yes, you start with the 90 degree column.
Re: Need help with wire spec
Posted by frank:
Originally Posted By: Tesla

I gave you the ECI link.

(ElectroCables Incorporated)

A squib photo of that cable is to the upper left.

Direct all future queries to:


They actually get paid to answer your queries, and can speak with authority.

Sorry i missed the link in (...)
Re: closet lights
Posted by sparkync:
According to the diagram layout of clearance in a clothes closet in Figure 410.2 ( 2011 Code), if I wanted to put an incandescent light in a closet, would I have to go by the bottom storage space which is 24 inches or the top storage space which is 12 inches? That would make a totally (...)
Re: Need help with wire spec
Posted by renosteinke:
What's the problem? Why can't you just use an available, appropriate cable? Why do you need an exact match?

PVC usually has 'plasticizers' added to give it flexibility. In truth, PVC is a very stiff / rigid plastic.
It's the plasticizers that give a new shower curtain that distinct smell. (...)
Re: RFI/EMI RF Filter
Posted by PN1:
Greetings fellow electricians and engineers. I have a question regarding EMS System filters( Adresses linear Vs Non linear loads). I have a project that requires an EMI fiter. The Characteristics are.

Max Applied Volts 230VAC
Operating frequency 50Hz
Maximum current Amperes 125Amps
Number of (...)
Re: Norwegian power?
Posted by dsk:
Great link, thank you.

Why IT? When I asked som 30 years ago, they claimed it to be safer. We should modernize a system from 1940 (IT) and the supplier would change the transformer at the same time, we offered to pay the extra cost to change to 400V TN-S or TN-C-S
but they refused "of safety (...)
Posted by Tesla:

Tucson Electric Power is a member of EUSERC... for what it's worth.
Re: What % of time working on energized equipment?
Posted by JoeTestingEngr:
I have to work on energized equipment almost 100% of the time, but as a Testing Engineer. I troubleshoot equipment that doesn't always work right or at all when it's on, but never works when it's off. I usually don't work on more than 120VAC or 134VDC control circuits, but I might be fairly (...)
Re: Square D Type QO 40A Tandem?
Posted by BigB:
You might have to install one of these next to the panel



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