Grounding for Mig welder
Danielle wrote: I'm actually reading your website for fun because I find it very interesting & informative. I was wondering though how the grounding works as far as using a mig welder & when they clamp to the table as the "ground"? Which side is clamped to the table & which to the welder? What makes that work like it does? Thank you!
El101: Glad to hear you consider this site fun and informative. This is a very good and unique question for this site. The MIG welder electrical output uses a simple DC circuit.
This welding gun has positive (+) DC voltage. The clamp or table has negative (-
DC and AC grounds are different from each other.
AC ground uses the earth as its ultimate ground.
DC ground is not connected to earth ground. DC ground is a common term for the negative (-
See the following DC current / flashlight diagram for a basic DC circuit.
Control ceiling fan and light with two switches
Bruce wrote: Changing a single switch to a double switch to control light and fan separately. Only 3 wires at switch box-
El101: Here is a link to get you going. You will need an extra wire from the switch to the fan/light, or if you have NM cable, replace the 2-
An option would be to add a remote control to the fan and keep the wiring you have.
14 AWG wiring for lighting
Penelope wrote: Is it best to use 14-
El101: 14 AWG is a common wiring size for lighting, and 12 AWG is common for receptacles in newer dwellings. The important factor is circuit breaker amperage rating. Size 14 AWG wire uses a 15 amp breaker, size 12 AWG uses a 20 amp breaker.
If you already have a 15 amp breaker on this circuit, 14-
Kevin wrote: Hey guys, if I need to wire 5 different things (outlet, light bulb, etc...) and instead of using wire nuts, I want to use those push-
El101: It is very easy to connect wires into push-
Never use push-
Phasing out rapid start ballasts
Michael wrote: Is it true that a lot of ballast manufacturers are going to be phasing out the Rapid Start ballast in favor of the Instant Start ballast due to the fact of newly designed LED replacement lamps.
El101: I haven't heard anything about phasing out these ballasts, but I have heard that T12 lamps will be phased out because they waste energy compared to T8 and T5. This phase out could take awhile.
Lighting controller needs to be replaced
Joan wrote: I am trying to replace a 3 way light controller on my china Hutch. It has 3 small spot lights that have high, medium & low with touch control. The unit on my china hutch says 200 watts. I can only find 150 watts. Does it matter if I replace it with 150 watts?
El101: That depends on the wattage of the spot lights. The total wattage of the 3 spot lights should not exceed the wattage of the controller. I recommend however, that the total not exceed 120 watts using a 125% derating factor.
Two lamp ballast with one lamp
Jeff wrote: can you use a 2 bulb 4 foot T 12 ballast on a single bulb 4 foot T 12 fixture and if you can what wires do you cap off?
El101: Sure you can. See the following link.
Pete wrote: How can I wire up a three-
There was a code change in the past that required the neutral wire to be present in each electrical box of 3 and 4-
El101: If the neutral wire is not included in each box, a two wire system can be used. The two wires are used as the traveler wires in between the two 3-
Note: A 2-