jea48
Responses from jea48
| One or two dedicated AC wire ? All three 20amp, 10 gauge Romex, and all three dedicated ground wire to new grounding rod, Absolutely worthless and dangerous if the EGC (Equipment Grounding Conductors) are not also connected to the equipment ground bus bar in the electrica... | |
| Intermittent low hum/buzz @bikeboy52 , It could be a signal tube with dirty and or corroded tube pin(s) to tube socket contact(s) connection(s). Pull each signal tube then plug it back in repeating the process a few times. This will clean the tube pins to tube socket cont... | |
| Dedicated Circuits - Subpanel importance? My son just completed the first phase of his residential electrical education @vinylvalet He should use that as a starting point and then try to move to the commercial and industrial electrical wiring industry. That's where the money's at. I ... | |
| Thorens TD 160 "pop" revisited Apparently, if left uncorrected it will eventually fry the contacts. Or worse, damage electronic equipment. We would like to think that the AC or DC power supplies we use to power our circuits are both clean and well-regulated supplies. Howev... | |
| Transformer question--need transformer that puts out nominal 240V for European Amplifier No, I reversed the hot and neutral conductor polarity. Yep- and that would be like flipping the phase polarity on the 240v (which is +/- 120v) Not really. Reversed receptacle polarity is where the HOT branch circuit conductor is connected... | |
| Transformer question--need transformer that puts out nominal 240V for European Amplifier Plugged the power cord into the wall outlet and checked the 240V output. Hot contact on 240V receptacle to equipment ground, 120V. Neutral contact on 240V receptacle to equipment ground 120V you only changed the polarity 180 degrees by flipp... | |
| Thorens TD 160 "pop" revisited A resistor should be wired in series with the capacitor. “Snubber” Circuit A sudden rise in voltage across the switch contact caused by the contact opening will be tempered by the capacitor’s charging action (the capacitor opposing the incre... | |
| Thorens TD 160 "pop" revisited As a rule turn on, (closure of the ON/OFF switch contacts), does not cause a high voltage transient. Opening the switch contact, (creating an arc), causes the voltage transient. To protect all the audio electronic equipment from the high voltage ... | |
| Thorens TD 160 "pop" revisited A couple of snubber circuits to use. Both circuits are wired in parallel with the switch contacts First is to wire a capacitor and resistor in series and install the two across the switch contact terminals. https://www.allaboutcircuits.com/tex... | |
| Did electrician set up my dedicated subpanel correctly? @battbot The four 20A branch circuit breakers are installed on both Lines, legs. Two on L1 and two on L2. What is the main 2 pole breaker ampere rating? I can’t read the number on the breaker handle. Any idea the size of the feeder wires fee... | |
| Dedicated Circuits - Subpanel importance? Guys, When the full 240V secondary winding is used to feed a 240V load the winding works like any other single phase transformer winding. Things change when 120V loads are connected to L1, leg, and the neutral, and L2, leg, and the neutral. This... | |
| Dedicated Circuits - Subpanel importance? @lowrider57 Said: Understood. We discussed this when you advised me about replacing my meter box and outside line due to corrosion. If you remember, distortion and DC was entering my service panel. I remember the thread. Harmonic distortion ca... | |
| Dedicated Circuits - Subpanel importance? @lowrider57 said: I’ve learned about grounding code from forums such as this. But I’ve been wondering why can’t a subpanel have it’s own grounding rod as long as the main panel has a grounding rod? This is unclear to me because the subpanel grou... | |
| component grounding The new Arcam Amp I just got (I am in th US) has a US mains style cable and plugs but the ground prong is absent, and the power socket on the amp has no ground element.. The Arcam Amp AC power wiring is certified Class II, double insulated AC ... | |
| component grounding Did you guys forget that on the positive side of the circuit there’s either a fuse in the fuse box or a circuit breaker. So even if you’ve got one hand on something that’s ungrounded and you happen to touch something that shorts out… then you’re ... |