20A or 15A receptacle

ejlog

hello, I have an electrical box in my basement that was installed for a future receptacle. There are 2 white wires going into the box. I am wondering if I should purchase a 15A or 20A; 125 volt receptacle for installation? I see that most of the electrical receptacles in my home have only one white wire and this one has two. Another electrical box in my basement which already is set up with a functioning receptacle has 2 white wires, but I can't detect if the receptacle is a 15A or 20A. I want to make sure I am connecting the correct receptacle and since I am not experienced with this install I am hoping to get some feedback and advise from the experienced electrical folks out there. thanks in advance.

MinConst

Before you do anything in this box I would recommend you find an electrician that can help you. There should be a black (hot) wire and a white (neutral) in the box. If you have only two whites something is not normal. If you don't know this you should not be in the box.

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ejlog

inside the box there are 2 sets of black and white wires. sorry for being unclear.

Speedy Petey

15 amp duplex receptacles are fine for residential use. Unless of course you need a 20 amp device, on a 20 aps circuit, for a specific application.
15 amp duplex receptacles are code legal on 20 amp circuits (unless you're in Canada).

White to silver, black to gold. The grounds get twisted together, cut one wire off and the other goes into a green wire nut with the single wire to the green screw on the receptacle.

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