Question 1

how many amps is this?

Accepted Answer

If you're asking about the amperage capacity of the 12/3 100' cord, then that answer is 15 amps. Without going into an electrical dissertation, the amperage capacity will be based on intended usage, power (amperage) requirements of the tool being used, continuous or intermittent amperage rating, and most importantly, the rating of your outlet whether residential or commercial. "Most" residential outlets are rated at 15 amps, even if on a 20 amp branch, since there are multiple outlets being fed.
Anyway, this cord is good for 15 amps. If you're connecting two, then it's time to look at a dedicated circuit versus extension cords.

Question 2

What is the truth. is the cord made in usa or china?

Accepted Answer

I bought the 100 foot 12/3 cord. Mine says made in Mexico.

Question 3

Can I combine the 50 foot with the 100 foot that I already have and use them with a plug in electric mower with a 12 amp motor?

Accepted Answer

Assuming the 100 foot cord is 10/3 or 12/3, yes.  Be sure you don't have anything else major running on that circuit, though (air conditioner, freezer, refrigerator, microwave, coffee pot, electric kettle, etc).  I ran a dedicated 12/3, 20 amp circuit outdoors so that wasn't a concern, in most of the US an electrician can do that for you for a few hundred dollars.  However, if your yard is that large you might want to consider a gas mower or a manual reel-type mower instead.  150 feet of cord is a lot to handle, especially when you are using it with a device that can cut the cord if you accidentally run over it and electrocute yourself to death in the process.

Question 4

is the wire copper

Accepted Answer

The only power cords that are legal in the US for AC use are copper.  If it is a recognized brand like this one, it will be copper.  If it is one of the random letters Shen Zhen (China) brands, it might not be.  Buy a recognized brand of extension cord to be safe, aluminum is a poor conductor of electricity and in the 1960's people burned their homes down with aluminum wiring (which is why it is banned now).  I have bought several things from China that were good quality items except for the cheap, thin aluminum power cord that came with them.  I replace the cord (a detachable cord can be replaced in seconds) and go about my day.

ASIN	B00004SQF4
Amperage	15 Amps
Best Sellers Rank	4,464 in Headphone & Earphone Adapters
Box Contents	Entension Cable
Brand Name	Southwire
Case Material Type	Vinyl
Colour	Yellow
Connector Gender	Male-to-Female
Customer Reviews	4.8 4.8 out of 5 stars (9,385)
Global Trade Identification Number	00029892825881
Input Current	15 Amps
Item Length	600 Inches
Item Type Name	Outdoor Extension Cord
Item Weight	0.5 Pounds
Manufacturer	Coleman Cable
Manufacturer Part Number	2588SW0002
Model Number	2588SW0002
Number Of Conductors	3
Number of Items	1
Number of Outlets	1
Plug Type	Type B
Power Cord Prong Count	3
UL Listed	Yes
UPC	029892825881
Unit Count	50.0 meter
Voltage	120 Volts
Water Resistance Level	Water Resistant
Wattage	1875 watts

Southwire 2588SW0002 Outdoor Cord-12/3 SJTW Heavy Duty 3 Prong Extension Cord-for Commercial Use (50', Yellow), 50 Feet

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