Questions tagged [panel]

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Replacing sub panel, grounding electrode conductor [migrated]

I am replacing the 200 amp sub panel in the basement, and trying to understand if it is required to run the grounding electrode wire to that sub panel or not. Currently, there is no grounding ...
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8 views

How to identify which live wire go with which neutral wire? [migrated]

Context I have an old electrical panel, with fuses. I want to replace it with a new electrical panel. In this panel there some problems, no color were respected, and the live wire and the neutral ...
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1 answer
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Solar panel battery charger

I am looking for a way to power my webcam without having to use a long extension cord outside. I have come up with this circuit. Will it work? Can I improve it? Thanks in advance for the help!
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How can water create a good ground reference?

In the 240V Single Phase panel in my home the ground bus is tied to a water line. My concern is water flows via a non-metallic pipe from the artesian well to a holding tank. A copper line connects the ...
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-1 votes
1 answer
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Efficiency of a solar cell

I am from Colombia where recently was opened a solar park with a power of 61 MW link to news I consulted the Solar radiation in the area and has a value of 5 kWh/m², the solar cell efficiency is 20%, ...
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Is it necessary to add rotary handles with each incoming and outgoing MCCBs in a Form 3B type LT switchgear panels?

As far as I understand, mainly the function of a rotary handle is a locking function. So in a form 3B type panel, where each breaker is kept in a separate compartments, will there be a problem if ...
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-1 votes
1 answer
92 views

What happens inside this duct?

At the top are wires coming out of a terminal block. On the left are gray tubes running into a cabinet full of sensors, motors, etc. Are these gray tubes conduits or cables? What is happening at the ...
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How to describe the basic cabling used in industrial electrical panels?

How would the basic cabling in electrical panels be technically described (in order to make a purchase, for example?) Does it have a certain number of cores? I'm talking about the kind of cabling you ...
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2 answers
926 views

Voltage present, even without fuse in DC distribution panel

I have an AC and DC distribution panel installed in my cargo trailer. And I think I have an issue with my DC side of the panel. This is my first electrical work of any sort and thought it was going ...
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1 vote
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Are PV panels convenient without incentives?

I finally finished a project in which I designed a 55 kW of PV system for a 50 kW load and I finally calculate costs and revenues over 20 years. I found that with a 25% of incentives for the cost of ...
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120 views

How to correctly bond two 200 amp main panels on a 400 amp service

I currently have a 200 amp service with a single 200 amp meter. That meter feeds a 200 amp main panel on the other side of the wall that the meter is mounted to (think standard residential ...
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2 votes
0 answers
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I need help with SCCR

I work as and E/E intern for a industrial panel company. A customer wants a 30kA SCCR panel. The input power is 3 phase 460V, an unknown distance from the main panel in the customer factory. Inside ...
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1 vote
2 answers
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How are PCBs with castellated pins arranged in a panel?

Can anyone please describe to me how PCBs with castellated pins are arranged in a panel. My understanding is that castellated pins are formed by drilling the edge of a PCB then plating, similar to a ...
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Lightest possible USB solar charger with 5V 2A to 3A output?

I'm doing a lot of wilderness expeditions an needs the lightest gear possible. I want to make a solar charger (for my nitecore nb10000) that is as light as possible and has a USB output 5V and between ...
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2 answers
65 views

Can metal electrical panels have a non-rectangular or squared shape?

Standard metal electrical distribution panels are rectangular or square shaped boxes. Is there any standard - IEC, NEC, etc.- contraindicating the manufacturing of a custom shaped box for an ...
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Where do I measure the Amp draw of my motor which is connected to a centrifugal fan?

I just started my job as an apprentice technician. For the longest time, my supervisor have always been measuring the amp draws of my motor from the outgoing cable from the motor to the electric panel ...
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1 answer
116 views

What does this switch do?

Also, what is that circuit element symbol (an arrow leaving a rectangle) called, in the diagram next to the switch?
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2 answers
51 views

Grounding Distribution Panel Earth Busbar using 'split' cable?

I'm pre-wiring a distribution panel for future installation into my retirement home in the Philippines. I've read that grounding the DP to an earth rod or equivalent should require a minimum 6AWG/...
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1 answer
114 views

can I use DC battery cable rated at 600A to connect a 63A main AC breaker to a 40A RCCB in my distribution panel?

I've read that for low voltage (less than 400V) applications, that the main difference between DC and AC wire is basically in the (temperature) rating of the cable sheath. If this is true, then the ...
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1 answer
371 views

how long will a 12V 5W solar panel take to charge a 12V 1.3Ah `lead acid battery

i wanted to know how long will it take for the 12V 5W solar panel to charge a 12V 1.3Ah battery. and also whats the maximum voltage that the panel can produce
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1 answer
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Charge 12 V, 1.3 Ah lead acid battery via 12 V, 5 watt solar panel

Can someone explain me the below circuit which is used to charge 12 V 1.3 Ah lead acid battery via 12 V, 5 watt solar panel? The circuit is shown below I need to know what is happening in this ...
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1 vote
1 answer
84 views

How can I make a 16x16 led pannel without losing the brightness intensity of each single led?

So, this is my first question here in this forum and I don't know if I'm doing this right. Then in fisrt place, I'd like to apologize myself if I'm doing something wrong or if my english is a little ...
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1 answer
406 views

overcharging issues in MPPT solar controller with NO output leads

My MPPT solar controller has no output leads. It contains only the (+,-)leads for battery and solar panel. Input is from the solar panel and output goes to battery.Therefore, I have to connect my load ...
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1 answer
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Solar car ventilation system

I am a mechanical engineering student and for my final project I am designing a solar car ventilation system so I need to know how much power the air conditioner of a car (Mazda Lantis 323 2001) fan ...
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-2 votes
1 answer
181 views

How to reduce to 10 V from a 44 V, 18 A solar panel supply?

I get 44 volts, 18 amps and 700 watts from two solar panels. I want to reduce approx 10 volts to run my inverter directly on solar panels instead of batteries during the daytime.
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1 answer
269 views

What is the type and name of this 15-pin connector pair?

This connector is suited on a Sony car stereo front panel. Searched the net however could not find anything. I love to extend the connection with a sort of cable so it possible to fit the front panel ...
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2 votes
1 answer
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Storing solar panels in direct sun

What is the best way to store solar panels when not hooked to a charge controller in direct sun? I was thinking about hooking each panels pos and neg mc4 connectors to itself so it will not be ...
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Can I use a 32x6mm catridge fuse with a fuse holder specified at 38x10mm

This is my first time incorporating fuses in my project. I am trying to source for some DIN rail mount fuse holders and the accompanying cartridge fuses. After much searching, I have found the fuse I ...
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1 vote
1 answer
686 views

Problem with Proteus Simulation of Buck Boost Converter - please help

I built the attach circuit, I was simulating a solar panel buck boost voltage regulator to regulate the output voltage. The problem is that while it works and shows the appropriate output. It doesnt't ...
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132 views

Protection Devices in DC ciruits

I am putting together a design for a custom Electrical panel. The panel consists of mainly DC powered components (Sensors, Controllers). Components are to be mechanically positioned using a DIN rail. ...
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Incorrect gerber rout output in Altium

I tried to get a panelized PCB from Altium using the embedded array option from the PCB Doc file. But, I get a continuous board edge around each of the PCB replicas: it would actually need mouse bites ...
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3 votes
1 answer
547 views

Is it necessary to provide surge suppressor to every control relay?

We have a motor control centre installed in garage for a commercial outlet. The MCC has a SMC-Flex ( Low voltage soft starter). The control relays (700 HA33) are connected to the SMC control ...
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Durable, UV-resistant labeling for electronics enclosure

I'm not sure if this is the right forum for this question. I'm asking here in hopes that someone has dealt with this. If this is the wrong forum, please do not vote me down. If necessary, I'll simply ...
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How to compute for bolted short circuit current taking conductor impedance into account

There is 23 feet of AWG 1 conductor from the open delta transformers to the service panel where the bolted short circuit and arc flash occurred. How do you include the impedance of the conductor with ...
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4 answers
653 views

Was this caused by arc flash or just short circuit without any arc flash?

Can the following be caused by short circuit without any arc flash? There was an initial short between lugs and chassis. Did arc flash occur that caused the lugs to melt. Or can it melt just by the ...
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1 vote
1 answer
393 views

Footprint panel is grayed on Altium Designer PCB

This is a project I imported from Eagle (not so bad by the way). I resolved all schematic compilation errors. But now I am facing some small issues in the PCB part: On the properties panel when I ...
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Solar variation tolerance for a solar panel

How to estimate average variation of input solar radiation that would be tolerable for a given solar panel? On what parameters will it depend?
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2 votes
2 answers
3k views

Necessary voltage to charge NiMH using Solar Panel

I'm trying to understand which voltage I need to charge my NiMH batteries so I can purchase the components to do this. Actually I have 2x AA Ni-MH 1.2 V 1900 mAh and 4x Solar Panel 2 V 220 mA (0.44 W)....
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2 answers
103 views

how to mount a flat keypad on a panel

Flat Keypad or Membrane Keypads are cheap and beautiful Keyboad that can be used in systems. but the question is how can they be mounted in a box or panel?
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3 answers
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Powering a PC monitor with batteries

So, this is where I am at currently( no pun intended). I am assuming that with an inverter for both components and 3 - 4-18650 cells in series - in parallel rated at 4800mAh would be good enough? Ill ...
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3 votes
0 answers
97 views

New DIY project try to understand MPPT [closed]

I got used battery MODULE with the next specs "40V 18.4AH 736WH build of ninety six A123-26650 LITHIUM LIFEPO4 cell " Cell specs: Nominal Capacity: 2300mAh Voltage(nominal,V): 3.3V Internal ...
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2 votes
1 answer
956 views

Matching LCD controllers to LCD compatible panels

Over the years, I've accumulated numerous LCD panels and controller boards salvaged from TVs, Monitors, Cell Phones, digital picture frames, GPS devices and tablets. I would like to reuse the panels ...
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380 views

I need help connecting 2 solar panels in paralel

I'm new to Electronics but I love solar panels and hiking. So, I bought 2 of these and one of these and I connected them. I cut 2 USB Cables, connected + with + and - with - from each Cable and ...
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-2 votes
1 answer
436 views

Electrical panel indicator lights flickering [duplicate]

I'm wondering what the underlying mechanism of the flickering of the panel indicator lights is. Are there electronic oscillators of some kind in there?
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85 views

Solar Panel Voltage vs. Consumer Solar Generator

I have a 235 W solar panel that I wish to take with me on camping trips. I’m looking at getting a Goal Zero “solar generator” product to store the energy from the panel, specifically the lithium-ion ...
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-2 votes
1 answer
637 views

Charging a car battery with solar panel [closed]

Sorry about the previous format, guess i was a bit confused and in a rush myself, So let me put it this way. I'm like, i have a dc battery and a solar panel which of course produce d.c so I'm ...
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0 votes
2 answers
946 views

C.P (unknown abbreviation, control cabinet drawing)

I don't know what "C.P" might stand for in a HVAC control cabinet drawing. Could anyone have a quick look? I'm not an electrical engineer, but a translator. Not sure what electrical component is ...
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24-30pin connector for digital picture frame

Hey all I have 3 27" lcd panels that I will be making digital picture frames out of and I am looking for advice on what i can use in order to use only 1 cable going to the digital picture frame since ...
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How can there be a non-zero voltage difference between Phase A on the left and Phase A on the right when they come from the same power source?

Hi StackExchange community, Here I have a wiring diagram that represents a portion of a circuit found in a hospital. The voltage difference was measured between phase A on the left and the phase A ...
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I need the name of a Hitachi TX26D60VC1CAB panels connector (picture included)

i have recently ventured into reverse-engineering this Compaq 420cxs panel. I have managed to find a semi-complete datasheet (more of a pinout-diagram) for it and with the help of an esp8266 based dev ...
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