Color-coded ruler for three-phase wiring

• US 4,700,491 A
• Filed: 02/12/1986
• Issued: 10/20/1987
• Est. Priority Date: 02/12/1986
• Status: Expired due to Fees

• Current Assignee: Troy E. Rhea Jr
• Original Assignee: Troy E. Rhea Jr
• Inventors: Rhea, Troy E. Jr.
• Primary Examiner(s): HAROIAN, HARRY
• Application Number:
  US06/828,702
• Time in Patent Office: 615 Days
• Field of Search: 33/494, 33/483, 33/485
• US Class Current: 33/494
• CPC Class Codes: G01B 3/004 Scales; Graduations
• CPC Class Codes: G01B 3/06 folding
• CPC Class Codes: H02B 3/00 Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
• CPC Class Codes: H02G 1/00 Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines

Abstract

An electrician'"'"'s color-coded ruler including sequentially numbered numerals each colored in one of three desired colors corresponding in a repeating pattern to the sequentially numbered poles of a three-phase panelboard.

Claims

1. An electrician'"'"'s color-coded ruler for identifying the wiring pattern of the three desired colors of the wire conductors to be connected to the respective phases of sequentially numbered poles of a three-phase panelboard, the ruler including sequentially numbered numerals each colored in one of the three desired colors corresponding, in a repeating pattern, to the sequentially numbered poles of the three-phase panelboard, the pattern defined as the first two numerals and numbered poles corresponding to the first desired color, the successive two numerals and numbered poles corresponding to the second desired color and the successive two numerals and numbered poles corresponding to the third desired color.

2. The color-coded ruler as set forth in claim 1, wherein said three colors comprise colors black, red and blue, respectively, to correspond to the three phases of the panelboard.

3. The color-coded ruler as set forth in claim 1, wherein said three colors comprise the colors brown, orange and yellow, respectively, to correspond to the three phases of the panelboard.

4. An electrician'"'"'s color-coded ruler for identifying the wiring pattern of the three desired colors of the wire conductors to be connected to the respective phases of sequentially numbered poles of a three-phase panelboard, the ruler including sequentially numbered numerals, each having colored indicia imprinted adjacent thereto, each said indicia colored in one of the three desired colors corresponding, in a repeating pattern, to the sequentially numbered poles of the three-phase panelboard, the pattern defined as the first two indicia and numbered poles corresponding to the first desired color, the successive two indicia and numbered poles corresponding to the second desired color and the successive two indicia and numbered poles corresponding to the third desired color.

5. The color-coded ruler as set forth in claim 4, wherein said three colors comprise colors black, red and blue, respectively, to correspond to the three phases of the panelboard.

6. The color-coded ruler as set forth in claim 4, wherein said three colors comprise the colors brown, orange and yellow, respectively, to correspond to the three phases of the panelboard.