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Re: [EVDL] 3 prong 220 to 4 prong 220 wall socket

Michael Clark wrote:
>I appreciate the information! I have a nice
>male connector that goes directly on the
>4 prong dryer cable so it looks ok.
>I'll put two female connectors on the
>extension cord that I am using that will
>then plug into the charger.

Ehhh - are you suggesting to make the dryer
cord with male to male plug? That sounds very
dangerous and illegal, because then you have
240V present on the pins of the second male
connector... Maybe I am not understanding
correctly why you would want to have a female
to female extension cord. Usually all cords are
made with one male that plugs into the power and
one female that is available for plugging in the
cord of a load. There should never be live power
on the pins of a male connector.
It is probably sufficient to move one female from
the extension cord to your dryer cord to have the
order of plugs correct again.

>The charger isn't onboard so I'll just cap off
>the 4th wire on the 4 prong dryer cord.

>I do have a question, If I were to mount
>the charger onboard the vehicle, when the
>white wire goes to the terminal block, it
>just ends there, it isnt connected to
>anything like the body of the EV for ground?

Correct if you are talking about the Neutral wire.
(same as capping it off)
You only need the two phase wires (red+black)
and ground (green) to connect your charger.

Please note that a known effect of such a setup
can be tripping a sensitive GFCI if the charger
has EMI suppression capacitors from (one of) the
phase inputs to ground, though the problem is
more likely to occur on 120V circuits because
most input circuits have identical capacitors
from both inputs to ground, which means that on
120V there is a leakage from phase to ground and
no current from Neutral to ground because those
are connected in the service panel and there is
no voltage between them.
On 240V there is equal leakage from each phase
to ground, so GFCI is not bothered if there are
equal capacitors from each phase.

On 120V some people have overcome the GFCI trips
by cutting the ground wire, but that means that
the car's chassis is at 60V AC and touching it
while charging will often give an unpleasant shock.
It is not much current (because it is limited by the
EMI suppression capacitors) but enough to spook you.

Cor van de Water
Director HW & Systems Architecture Group
Proxim Wireless Corporation
Email: [email protected] Private:
Skype: cor_van_de_water IM: [email protected]
Tel: +1 408 383 7626 VoIP: +31 20 3987567 FWD# 25925
Tel: +91 (040)23117400 x203 XoIP: +31877841130

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