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208 volts
208 volt is usually derived from commercial 3-phase transfomer configurations.

Electrical equipment and timers that are rated for 240 volt are often rated for 208 volt.
Each electrical device has a rating plate that lists the voltage and wattage.

Residential home is US does not have 208 volt
Residential services have 1 transformer. Inside the transformewr are two coils
Commercial 3-phase services have 2 or three transformers, each with 2 coils inside each transformer
Most residential residential electric services are 120-240 volt with 2 hot legs and 1 neutral

Hog leg to neutral gives 120 volt
Hot leg to Hot leg gives 240 volts
208 volts is not available.
Some commercial buildings have 208 volt

By using 208-120 WYE service where 2 or 3 hot legs supply voltage or selecting

Images shows 3 transformers, normally found on the power pole near each business, or located underground in an electrical valut.

How to identify transformer wiring
Transformer resources
Commercial buildings with high leg delta service have 208 volt
High leg delta service offers choices of 120-208-240 volts with 3 hot legs and 1 neutral
208 volt is derived from 1 black Hot leg and the center-tap neutral.
Any ordibnary resistance element can be connected to 208 volts.
208 volt elements

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