Best Fluke 1507 Test Leads: What to Check Before You Buy

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If you are looking for fluke 1507 test leads, start with the leads’ ratings, not the maker’s name on the box. Test leads carry the current and voltage from your meter to the circuit, so their ratings and plug size decide whether they are safe to use. Three checks decide the choice: the voltage and current rating, the CAT marking, and the plug and probe type. The silicone kit states CAT III 1000V and 10A, so start there.

Quick answer

Pick test leads by three checks: the voltage and current rating, the CAT marking, and the plug and probe type. The three listings that fit this keyword are multimeter leads with 4mm banana plugs. The two silicone kits state CAT III 1000V and a 1000V or 600V rating, and the test hook set states 600V and 10A. None of the listings names the Fluke 1507, so confirm the plug fit and the rating before you buy. Use leads only within their stated rating, and follow your meter manual.

What matters for this keyword

Five criteria change with this keyword. Rank them by the job the leads will do.

Voltage and current rating

A lead must be rated for the voltage and current you will measure. The silicone kit in this group states a CAT III 1000V rating and a current of 10A. The retractable lead set in the same group is not included here, because its listing conflicts with itself on what it is. The 4mm test hook set states a voltage of 600V and a current of 10A. Read the rating on the lead itself and in the listing, and do not exceed it.

CAT marking and where you will use the leads

Read the CAT rating first, because it decides where the leads may be used. Measurement category is a classification by the International Electrotechnical Commission (IEC) of live circuits used in measurement. It takes into account the total continuous energy available at a point in the circuit and the occurrence of impulse voltages. Category II is for measurements performed on circuits directly connected to the low-voltage installation. Category IV is for measurements performed at the source of the high-voltage installation. The silicone kit lists CAT III 1000V and CAT IV 600V. The IEC 61010-1 standard requires that the transient withstand capability of the equipment is made known to the user, so check the lead listing and the meter manual together.

Plug type and meter sockets

Most multimeter leads in this group use a 4mm banana plug. The listings describe 4mm banana plugs on the kit, the fork lead set and the hook lead set. Check that your meter’s input sockets take 4mm plugs and that the lead’s plug seats fully. A loose plug can make a poor connection, so push the plug in until it stops and test the fit before you rely on the lead.

Your meter manual is the best source for the socket specification. Look for the input jack labels and the maximum voltage shown beside each jack. If the lead listing and the meter manual disagree, follow the stricter of the two and ask the seller to clarify. The best test circuit breaker with multimeter guide covers a related job in which the lead type matters.

Probe tip and clip type

Probe tips, alligator clips and test hooks each suit a different job. The silicone kit includes puncture probes, alligator clips and test tweezers, which help when you need to reach a wire under insulation or hold a lead in place. The fork-style lead in this group has a copper fork insert and an alligator clip, which helps with hands-free work. The test hook lead suits a job where you need to hook a wire without a probe. Choose the tip that matches the contact point you will reach.

Insulation, length and flexibility

Silicone insulation is soft and flexible, which helps when you work in tight spaces. The listings describe silicone insulation on two of the three picks. The fork lead is listed at 3.3 feet long, and the test hook lead is listed at 3.86 feet, or 1.18 m. Length matters: a longer lead reaches farther but can tangle, and a short lead keeps the meter close to the circuit. Pick the length that fits your bench or job.

OSHA 29 CFR 1910.305 states that flexible cords and cables shall be protected from accidental damage, such as by sharp corners, projections, doorways or other pinch points, and shall be supported so that they are protected from physical damage. That rule is written for workplace cords, but the same logic applies to meter leads. Route the lead away from sharp edges and doors, and keep it off the floor where it can be crushed.

Storage and care

A lead lasts longest when it is stored in its case or a dry drawer, away from heat and sharp tools. Coil the lead loosely, because a tight coil can strain the insulation at the plug. Wipe the insulation with a dry cloth when it gets dirty, and let the lead dry fully before you store it. If the insulation cracks or the plug loosens, take the lead out of use. The listings do not state a service life, so inspect the leads on a regular schedule.

What the listings state and what they leave out

Reading a listing separates what the seller has stated from what you would have to assume. The silicone kit states 25 pieces, a weight of 0.48 kg, CAT III 1000V, CAT IV 600V, and a package with two banana plug leads, two banana plug to test hook leads, two multimeter pens, twelve wire piercing probes, two high voltage test hook clips, four alligator clips, a test tweezer and a storage box. The fork lead states 1000V and 15A, a 3.3 foot cable and copper clamps. The test hook lead states 600V, 10A, 16 AWG wire and a total length of 3.86 feet.

The listings leave several points open. None of them names the Fluke 1507, so no listing states compatibility with that meter. None states a warranty for the leads. The silicone kit does not give a CAT rating for each individual accessory in its kit, so check the rating on each piece you plan to use. When a point is missing, treat it as unknown and ask the seller before you buy.

How to choose

• Choose the silicone kit if you want a range of probes, clips and hooks in one set, and your circuits stay within its CAT III 1000V listing.
• Choose the fork lead set if you want a long cable with a fork insert and an alligator clip for hands-free work.
• Choose the test hook lead if you need to hook a wire and your work stays within 600V and 10A.
• Skip any lead whose rating is below the highest voltage and current you will measure.

OSHA 29 CFR 1910.303(b)(2) states that listed or labeled equipment shall be installed and used in accordance with any instructions included in the listing or labeling. Apply that principle to leads: follow the listing and the meter manual, not a guess about what the leads can take.

Whichever lead you choose, check the plug fit, the rating and the CAT marking before use. Replace any lead with cracked insulation, a loose plug or exposed metal. For a wider view of meter accessories, see the best Fluke 117 case guide and the best Fluke 179 accessories guide.

Products that fit this

Each card shows the specs, pros and cons for that lead set. Compare the voltage rating, the CAT marking and the plug type before you choose.

Worked example: planning a lead kit for a bench

If each lead pair is used for about 40 hours before a check, then 2 leads x 40 hours = 80 lead hours per meter, and 4 meters x 80 lead hours = 320 lead hours on the bench. Check the arithmetic again: four meters with two leads each is 8 leads, and two leads at 40 hours each is 80 lead hours per meter. The listings do not state a service life, so treat the 40 hours as your own planning figure and inspect the leads regularly.

Common mistakes

• Buying by the brand on a meter instead of the lead’s own rating. The rating on the lead and in the listing decides where it may be used.
• Assuming a silicone kit covers every job. The kit states CAT III 1000V and CAT IV 600V, but the listing does not give a separate CAT rating for each accessory.
• Forcing a plug into a socket that does not match. The listings describe 4mm banana plugs, so check the socket before you connect.
• Using a breadboard jumper set for meter work. Alligator-clip jumper sets are made for breadboards and small electronics, and they lack the banana plug that a meter needs.
• Choosing a lead by length alone. A longer lead can tangle and pull the meter off the bench, while a short lead can strain at the plug.
• Leaving a damaged lead in service. Cracked insulation, a loose plug or exposed metal means the lead must come out of use.

FAQ

Do these leads fit a Fluke 1507?

None of the listings names the Fluke 1507, so none states compatibility with it. Check your meter’s socket size and the lead’s plug type, and ask the seller if the listing does not say.

What does CAT III 1000V mean on a lead kit?

It means the listing gives the kit a CAT III measurement category and a 1000V rating. Category III covers circuits in the building installation. Read the manual for the exact limits, and do not exceed the rating.

Are silicone leads safer than plastic leads?

The listings describe silicone insulation as soft and flexible. Flexibility helps the leads stay supple in use. Safety depends on the rating, the CAT marking and the condition of the insulation, not on the material alone.

Can I use a 600V lead on a 1000V circuit?

No. A lead rated 600V is not rated for a 1000V circuit. Use only leads whose listing covers the highest voltage you will measure.

What is the difference between a test hook and an alligator clip?

A test hook hooks onto a wire or terminal. An alligator clip grips a contact and holds the lead in place. Choose the one that matches the contact point and the job.

Do I need the storage box?

The silicone kit includes a storage box. A box keeps the leads coiled and protected, which helps prevent insulation damage. It does not change the rating of the leads.

Should I buy a kit or single leads?

A kit suits a workbench where you need several probe styles and spare parts. Single leads suit a job with one meter and one set of contact points. Compare the rating of each piece you will use, because a kit can include parts whose listing does not give a separate rating.

How often should I check the leads?

Check the leads before each use. Look for cracked insulation, a loose plug or exposed metal. Replace any damaged lead before you measure.

Bottom line

Choose the silicone kit for a range of probes and clips within CAT III 1000V. Choose the fork lead set for a long cable with hands-free clips. Choose the test hook lead for hooking a wire within 600V and 10A. Before any purchase, confirm the plug type, the voltage and current rating and the CAT marking, and check the fit on your meter.

Sources

• Measurement category: how IEC categories classify live circuits by energy and impulse voltage.
• Multimeter: what a multimeter measures and how digital displays differ from analog meters.
• OSHA electrical safety: common causes of electrical injuries and ways to reduce the risk.