[Venky03]

Note from Mod: Post split from this thread : 1000km Trip with my Nexon.EV MR | Charging details...

Originally Posted by Cayenne-8055

Thanks for sharing @Venky03. I'm curious to know about the Earthing issue you encountered, is it something commonly faced by EV owners?

+

Originally Posted by GreenerPlanet

Very interesting. This deserves a new thread.

+

Originally Posted by Saanil

Could you kindly post some pictures / details of the charging extension kit you have made along with the arrangements of earthing?

I've encountered slow charging issues at all the places I've booked in inner parts of Maharashtra, which is due to improper earthing.

The extension kit has 2x 20A Anchor Roma sockets and switches and a 20m 3-core 2.5 sq-mm polycab cable.

The second socket functions as a backup or grounding outlet.



Earthing setup (Ideally should have a copper grounding rod):





I've checked with local shops but they have the long length copper earthing kits which are not practical for a portable setup.

[Rehaan]

Originally Posted by Cayenne-8055

I'm curious to know about the Earthing issue you encountered, is it something commonly faced by EV owners?

Quoting from Team-BHP's very first Official Review of an Electric car:

Originally Posted by Rehaan

• Make sure your wall-socket is properly earthed, else a red light on the e2o plug-head lights up and the car won't charge. The good thing is that you can take only the charging cable along to test a plug-point (no need to move the car). A green light comes on if it's all good.

I found a plug-point near my parking spot! Turns out, the earthing wire wasn't connected, causing the red light to come on:


Investing in an extension cable might be a good plan for a rainy day! The e2o uses the larger 15-Amp plug that most fridges and air-conditioners use. The more commonly found 5-Amp plug is shown on the right:

Originally Posted by Venky03

The second socket functions as a backup or grounding outlet.

Attachment 2618933

Wow this answers a question that's been plaguing me for months!

I kept seeing this weird exhibit left by electricians in newly completed houses (in Goa):


...and now at least I understand it's probably something to do with connecting the grounding of 2 circuits together!

Originally Posted by Venky03

Earthing setup (Ideally should have a copper grounding rod)

If you do get one of these, maybe it makes sense to also insulate the top of it (kind of like the screwdriver you've used), as I can't help but think it's not ideal to have these around at charging stops (families / kids roaming around) - even though it is technically "earthed".

[AkhilR]

Originally Posted by Rehaan

Quoting from Team-BHP's very first Official Review of an Electric car:

Wow this answers a question that's been plaguing me for months!

I kept seeing this weird exhibit left by electricians in newly completed houses (in Goa):
Attachment 2618936

...and now at least I understand it's probably something to do with connecting the grounding of 2 circuits together!

This looks more like a provision for connecting an inverter.

[bejoy]

Originally Posted by Rehaan

I kept seeing this weird exhibit left by electricians in newly completed houses (in Goa):
Attachment 2618936

...and now at least I understand it's probably something to do with connecting the grounding of 2 circuits together!

Originally Posted by AkhilR

This looks more like a provision for connecting an inverter.

Yes, it is a provision for installing Inverter in the home. But can be very dangerous for anyone curious. One of socket is live EB supply and other socket is inlet for the light load circuit of the home - only the electrician who fixed it knows which is which . The plugs that inter-connect becomes a shock hazard if removed. Need to be very careful if kids are around, as it is normally placed at low height. Sorry for OT.


Ingenious method of grounding by the OP

[varkey]

Originally Posted by Rehaan

I kept seeing this weird exhibit left by electricians in newly completed houses (in Goa):
...and now at least I understand it's probably something to do with connecting the grounding of 2 circuits together!

This looks like a very un-safe installation of an inverter/power backup circuit (however this is better of the lot as it seems to include a switch). The idea would be that one of them would be the input to the inverter system, and the output from the inverter is connected to the other socket. However this practice is very un-safe, say the plug top is connected to the input/energised socket first, the other plug top exposes an energised male plug, an electrical shock hazard.

If you notice in a properly designed electrical installation any energised electrical part always use a female type socket to prevent any accidental electrical shock. And a male plug once inserted do not expose any non-insulated part ensuring safety.

Unfortunately this has become a practice by electricians, probably for ease of use or something. Recently did some home renovation, and an electrician who otherwise looked competent did a similar installation and I had to ask him to redo it. I asked him to replace the output socket with a cable (connected internally within the junction box behind the faceplate) with an exposed plug top for carrying the output from the inverter/backup system. The plug top will never be energised unless its connected to the inverter or the input socket. So if you want to bypass the inverter, you could simply disconnect the plug top from the inverter and connect it directly to the input socket.

[ampere]

Originally Posted by Venky03

I've encountered slow charging issues at all the places I've booked in inner parts of Maharashtra, which is due to improper earthing.

Can you help explain why should an improper earthing result in slow charging?

Ideally if the charging is rated for X amps and a socket and the outlet is rated to deliver current > X amps, the device will extract X-Amps from the system.


How does this above assertion get impacted by bad earthing?

[Venky03]

Originally Posted by ampere

Can you help explain why should an improper earthing result in slow charging?

Ideally if the charging is rated for X amps and a socket and the outlet is rated to deliver current > X amps, the device will extract X-Amps from the system.


How does this above assertion get impacted by bad earthing?

The context was actually different, by slow charging I meat charging with portable 3.3kW charger and not the current delivery. If there are earthing issues the TaMo charger shows ground fault error and will not initiate the charging.

[ferrarirules]

Originally Posted by ampere

Can you help explain why should an improper earthing result in slow charging?

Earthing is not proper means that the voltage between earth and neutral is not near to zero (lesser it is the better). On such a plug when you will charge your car for a long duration, the plug will heat up more. In Tata 3.3 kw charger it detects the plug getting hot beyond a specific temperature then it start blinking the red light along with the green light. This is mean the plug is hot and it trying to control the temp. For controlling plug temp, it will decrease the current to try to keep the plug temperature in check. This will cause slow charging.