Question about wiring a 14v transformer

[Birds]

I have a question about wiring a 14v @ 6A transformer (a Hammond Mfg. 266PA14) as a dedicated accessory transformer. It should provide a total of about 84 watts of power.

This wiring will be in series.

Here is the wiring info from the manufacturer:

Wiring the Primary:


Q1: An AC plug is connected to wires 4 & 1 to get power from an outlet?

Q2: Wires 2 & 3 are "jumpered", does this mean you tie wires 2 & 3 together with a wire nut?

Q2: There is a second "dot" on wires 4 & 2. These are phasing dots according to the manufacturer. What does this mean in terms of how one has to wire things up?

Wiring the Secondary:


Q1: Wires 5 & 8 would go to a binding post to which accessories would connect?

Q2: Wires 6 & 7 would be "jumpered", connect them together with a wire nut?

Thanks,
Birds

[Anonymous]

Hello Birds,

The 266PA14 primary is rated for 117/234 volts. For 117 volt operation, the windings must be connected in parallel. Connect the hot wire in series with a 1 amp fuse and on/off switch (or use a power strip) and then to pins 4 and 2. Connect the neutral side of the line to pins 1 and 3. Note that the two phasing dots must be connected together for a parallel connection.

For the secondary, the choices are 14V @ 6A or 7V @ 12A. For 14V, the secondary must be connected in series (jumpering pins 6 & 7) as shown in the 2nd figure.

Daniel Lang

[Birds]

Daniel,

Thank you for your reply. I appreciate you correcting me on the primary needing to be wired in parallel for 117 volt input.

I am still a little fuzzy on the concept of "jumpers" with this particular transformer.

This transformer has wire leads instead of lugs or pins. To jumper wires 6 & 7 on the secondary, does this mean that the ends of wires 6 & 7 are stripped and then tied together with a wire nut?

Lastly, with the primary input being 117 volts and our house current being 120 volts, might this cause the secondary output be a little hotter than 14 volts?

Thank you,
Birds

[Anonymous]

Dont worry about the voltage differnce. Electrical devices are engineered for at least a 10% tolerance. Make sure you fuse both sides of the transformer and insulate the high voltage side from accidentally being touched.

Dale Hz

[Anonymous]

The color codes for the wire leads are shown here:
http://www.hammondmfg.com/266.htm

Yes, you can strip the blue & grey wires and use a wire nut to tie them together.

120V instead of 117V means that the secondary wil be 14*120/117 = 14.4V. No load voltage may be a bit higher and full load may be a bit lower (1 or 2 volt drop from 0 to full load).

Daniel Lang

[Birds]

Dale and Daniel,

Thank you very much for your responses and help. It is greatly apprecited.

Birds