Gauge for testing contact-making and protection against accidental contact during insertion of lamps in lampholders E14

Gauge for testing contact-making and protection against accidental contact during insertion of lamps in lampholders E14

Purpose: to check E14 lampholders in respect of: a) contact-making with lamps having adverse dimesions.
b) protection against accidental contact with live parts, viz, the cap shell, during insertion of a lamp.
Testing: the holder is connected in the test circuit as shown. a) with switch A in position 2 and switch B open, the gauge is screwed fully home. in the position, both lamps shall light. b) with switch A in postion 1 and switch B closed, the gauge is screwed in slowly until either of the lamps lights. With the gauge held in this position, switch B is opened and the test probe at the side of the gauge is slid downwards as far as it will go into the space between the gauge and the holder. In this position the lamps shall not light.

RELATED GAUGES:

"go" Gauges For Screw Threads of Lampholders E14, 7006-25-7
"not go" gauges for screw threads of lampholders E14, 7006-26-4
Plug Gauge For E14 Lampholder For Testing Contact Making, 7006-30-2
Gauge For Testing Contact-Making of Lamps In Lampholders E14, 7006-31-4
Plug Gauge for Lampholders E14 with candle shaped shaft for candle lamps for testing contact making, 7006-30A-1

The Gauge for testing contact-making and protection against accidental contact during insertion of lamps in lampholders E14 is a protection-against-accidental-contact gauge built to IEC 60061-3. The E14 cap is an Edison screw with 14 mm nominal major thread diameter — small Edison screw (SES) caps used on candle, appliance and decorative lamps. Kingpo machines this gauge in-house from hardened tool steel, inspects it against the sheet before despatch and ships it with a calibration certificate, so it can go straight into an incoming-inspection or production-gauging routine.

What this gauge checks

• That no live part of the cap can be touched during insertion of the lamp
• The gauge planes specified on the sheet, read visually or with the specified feeler

The dimension that matters on a E14 cap is 14 mm nominal major thread diameter. It is what decides whether the lamp seats correctly and stays safe in the holder, and it is the geometry this gauge is built around.

Specification

How the test is run

1. Bring the gauge and the lamp to ambient temperature.
2. Push the lamp into the gauge as far as it will go.
3. Read the gauge planes: the lamp plane must not protrude beyond the gauge plane.
4. Record the result. This is a shape check, not a force check — no torque is applied.

The verdict is live parts must not be reachable when the lamp is inserted. Read the gauge, do not force it: a limit gauge that is forced into place tells you nothing about the part and damages the gauge.

GO and NOT GO — why you usually need both

A single limit gauge proves only one side of a tolerance. A GO gauge shows the part is not too small; a NOT GO gauge shows it is not too large. Running both is the only way to demonstrate a cap or a lampholder sits inside the band, and it is what an auditor will expect to see recorded. If you are building a gauge set from scratch, order the two together and keep them in the same case.

This gauge is not a GO / NOT GO pair on its own — it reads a specific feature. Pair it with the GO and NOT GO gauges of the same series when you need full dimensional coverage.

Getting the right sheet

IEC 60061-3 assigns one sheet number per gauge, and the number is what you should order against. Three things decide it: the cap family, whether you are checking a finished lamp or a lampholder, and which feature is being checked — thread, contact-making, protection against accidental contact, insertion torque or a named dimension. Sending us the sheet number avoids the most common error in this category, which is ordering a cap gauge when the test is on the holder, or the other way round.

Frequently asked questions

Is this gauge supplied with a calibration certificate?

Yes. Every Kingpo gauge is inspected against the sheet before despatch and shipped with a calibration certificate. We can also re-calibrate gauges you already hold.

Which lamps does the E14 version cover?

It covers E14 caps — 14 mm nominal major thread diameter. If your lamp uses a different cap family, the sheet number will be different; send us the cap marking and we will identify the sheet you need.

Can you make a gauge to a drawing instead of to a sheet number?

Yes. We machine to customer drawings as well as to IEC 60061-3 sheets, including modified gauges for production gauging where a full standard gauge is impractical.

What wears out on this type of gauge?

The gauging surfaces and any thread. Limit gauges are inspection tools, not production tools: keep them off the production line, store them dry, and re-calibrate on a cycle set by usage rather than by calendar.

Related gauges and equipment

Other E14 gauges in the same cap family:

• E14 lamp cap gauge - Not go gauge for E14 caps on finished lamps - 7006-28B-1
• Go gauges for screw threads of lampholders E14 - 7006-25-7
• IEC60061-3 E14 7006-55-2
• E14 lamp cap gauge - Not go gauge for E14 caps on finished lamps - 7006-28B-1
• E14 lamp cap gauge - Gauge for finished lamps fitted with E14 caps for testing contact making - 7006-54-2
• E14 lamp cap gauge - Gauge for finished lamps fitted with E14 caps for testing protection against accidental contact

Send the standard, figure number and quantity to Kingpo technical sales for a quotation and delivery date.