Search: Posts Made By: engr3000
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09-19-19, 12:52 AM
Replies: 7
Views: 284
Posted By engr3000

201V / 116V = 1.73 = sqrt (3) which is just what...

201V / 116V = 1.73 = sqrt (3) which is just what you would get if the two hot lines are each phases from a "wye" type three phase system. The nominal hot-to-hot would be 208V and the hot-to-neutral...
09-08-19, 10:40 AM
Replies: 9
Views: 232
Posted By engr3000

One option might be to connect the light...

One option might be to connect the light circuit/outlet with a constant hot wire, and then use a smart bulb like a Philips Hue with the wireless battery-powered switch/dimmer:
...
06-05-19, 06:20 AM
Replies: 2
Views: 381
Posted By engr3000

I assume you're talking about an H-bridge of 4...

I assume you're talking about an H-bridge of 4 mosfets.
When you say delay do you mean the frequency or period of the signal? With a delay you just have to wait longer for the same signal to appear....
06-03-19, 06:24 AM
Replies: 7
Views: 628
Posted By engr3000

I'm in agreement with all of Joe's comments. ...

I'm in agreement with all of Joe's comments.
The neutral conductor must be colored white or gray according to 200.6 of the NEC.
It could be that the yellow wire goes to the light and this separate...
05-30-19, 04:04 PM
Replies: 3
Views: 502
Posted By engr3000

There should only be one place where a neutral...

There should only be one place where a neutral conductor is bonded to the equipment grounding conductor. Otherwise some of the current that should be in the neutral will flow through the ground...
Replies: 13
Views: 297
Posted By engr3000

As pointed out by Ray you can't just run a...

As pointed out by Ray you can't just run a neutral in a cable by itself without a hot wire that completes the circuit in the same cable (so that the magnetic fields cancel).

But instead of the...
Replies: 13
Views: 297
Posted By engr3000

Strange that it looks like they are using two...

Strange that it looks like they are using two Romex cables to complete a single switch loop. And then using only the white wires at that.
The light fixture you want to control will have a neutral...
05-15-19, 12:20 PM
Replies: 23
Views: 338
Posted By engr3000

The VFD lowers its output voltage when it lowers...

The VFD lowers its output voltage when it lowers its output frequency to provide lower motor speeds. This keeps the current drawn by the motor relatively unchanged. This is necessary to prevent...
Replies: 57
Views: 1,276
Posted By engr3000

Try taking a jumper cable for a car and use one...

Try taking a jumper cable for a car and use one of its two leads to jumper between the negative terminal of the battery and the engine block or starter housing. Then if this helps it to start you'll...
Replies: 26
Views: 894
Posted By engr3000

The power supply provides an approximately...

The power supply provides an approximately constant 19V independent of the load current up to the maximum allowable load current of 3.16A. The current drawn by an LED depends on (and increases with)...
05-02-19, 11:08 PM
Replies: 13
Views: 367
Posted By engr3000

You need a separate 12V supply powered from 220V...

You need a separate 12V supply powered from 220V (or whatever source you have available) and it is not on your schematic of the controller. This is to supply the power needed for the motor, and it...
05-02-19, 08:09 PM
Replies: 13
Views: 367
Posted By engr3000

Alternatives to using a FET would be to: 1....

Alternatives to using a FET would be to:

1. turn on and off the 220V AC input to a 12v supply through the SSR. This would perform the required function, but it would be relatively slow in...
05-02-19, 06:45 AM
Replies: 13
Views: 367
Posted By engr3000

By the way, your SSR very likely uses a Triac...

By the way, your SSR very likely uses a Triac which is only suitable for switching AC power not DC like your fan requires. A Triac can be triggered to latch ON, but it requires the voltage it's...
05-01-19, 10:00 PM
Replies: 13
Views: 367
Posted By engr3000

From what I saw on the manufacturer's website...

From what I saw on the manufacturer's website your model of the controler supplies 12V at 30 mA max on the port that normally drives a SSR (solid state relay). If you want to drive the motor directly...
05-01-19, 06:24 PM
Replies: 13
Views: 367
Posted By engr3000

Would need to know the characteristics of the 12V...

Would need to know the characteristics of the 12V blower motor such as current draw.

The grill appears to be designed for natural convection venting, so even with a small amount forced air you...
04-20-19, 06:24 PM
Replies: 4
Views: 316
Posted By engr3000

With the 4 inch square box that Pete mentioned...

With the 4 inch square box that Pete mentioned you can also use a mud ring cover with an offset single device opening, if that would help:
...
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